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Professional Stain Removal Guide

Professional Stone, Tile and Concrete Stain Removal Guide

Professional guidance for identifying and treating rust, oil, grease, coloured marks, organic contamination, paint, graffiti and deep-set staining on natural stone, tile, concrete and other specialist mineral surfaces.

Rust and oxidation Oil and grease stains Organic and coloured marks Paint and graffiti removal
Suitable surfaces may include:
Marble Limestone Travertine Granite Sandstone Terrazzo Porcelain Ceramic tile Concrete Brick
Start with stain identification

The correct treatment depends on what caused the stain

Professional stain removal should begin by identifying the surface, the likely source of the stain and how deeply the contamination has penetrated.

Rust requires a different treatment from oil. Paint and graffiti require a different chemistry from organic staining, tannin, food, drink or coloured shadowing.

The material is equally important. A treatment that may be suitable for granite, porcelain or concrete may be too aggressive for marble, limestone or travertine.

Complete a small test before treating the full area. Deep stains may require more than one application, a poultice system or a second treatment for residual shadowing.

Common contamination types

Identify whether the stain is metallic, oily, organic or synthetic

The visible colour alone does not always confirm the source. Consider what was placed, spilled or installed in the area.

Metallic staining

Rust and oxidation

Rust can be caused by metal furniture, fixings, tools, irrigation water, fertilisers or metal contamination within or beneath the surface.

  • Orange or brown marks
  • Metal contact points
  • Oxidation around fixings
  • External paving contamination
Oily contamination

Oil, grease and wax

Oil can penetrate deeply into porous stone and concrete, often creating a darker patch that remains after normal surface cleaning.

  • Cooking oil
  • Motor oil
  • Grease and lubricants
  • Wax or oily product residue
Organic staining

Food, drink, leaves and tannin

Organic stains may be caused by coffee, wine, food, leaves, flowers, soil, wood, plant pots or other natural materials.

  • Brown or coloured shadowing
  • Leaf and plant-pot marks
  • Food and drink spills
  • Tannin and organic residue
Synthetic contamination

Paint, ink and graffiti

Synthetic coatings normally require a solvent-based remover capable of softening paint, ink, resin or graffiti without unnecessary damage to the substrate.

  • Permanent ink
  • Spray paint
  • Synthetic enamels
  • Resins and coating residue
Coloured residue

Residual marks and shadowing

A first treatment may remove the main source while leaving colour or shadowing within the pores of the material.

  • Remaining coloured outlines
  • Organic shadowing
  • Dye or pigment traces
  • Follow-up treatment required
Deep-set contamination

Stains requiring a poultice

Some stains require extended contact with the treatment. A poultice can hold compatible chemistry against the surface and help draw contamination from porous material.

  • Deep oil staining
  • Persistent coloured marks
  • Vertical or detailed areas
  • Longer controlled contact time
Quick selection guide

Match the stain and surface to the treatment

Stain type
Surface consideration
Suggested product or system
Rust
Marble, limestone, travertine or another acid-sensitive stone
MAR GEL PLUS, subject to testing and product instructions
Rust and oxidation
Suitable mineral or acid-resistant surfaces
NO RUG after confirming surface compatibility
Oil and grease
Porous natural stone, concrete or mineral surfaces
NO OIL, with repeated treatment or poultice where required
Coloured or organic staining
Compatible stone, tile and mineral surfaces
OXIDANT or NO MAC GEL according to the stain and surface
Paint, ink or graffiti
Compatible natural stone and hard surfaces
GRAFF GEL, followed by residue and shadow assessment
Deep-set stain
Porous or vertical surface requiring extended contact
Compatible stain remover thickened with FABER POULTICE
Professional stain removers

Select the product according to the stain and material

Each card links directly to the relevant AK Surface Solutions product page. Always review the full instructions before use.

01

MAR GEL PLUS

A specialist gel treatment for rust staining on natural stone, including acid-sensitive materials where suitable.

  • Targeted rust stain treatment
  • Gel consistency for controlled application
  • Suitable for horizontal or vertical areas
  • Test before treating the full surface
View product
02

NO RUG

A professional rust and oxidation stain remover for compatible mineral and hard surfaces.

  • Rust and oxidation marks
  • External and internal treatment
  • Use only on compatible surfaces
  • Complete a test area first
View product
03

NO OIL

A solvent-based stain remover designed for oil and greasy contamination on suitable stone and mineral surfaces.

  • Cooking and motor oil stains
  • Grease and lubricant residue
  • Suitable for deep porous contamination
  • Repeat treatment may be required
View product
04

OXIDANT

A specialised treatment for compatible coloured, organic or oxidation-related staining.

  • Organic and coloured marks
  • Residual stain treatment
  • Professional targeted application
  • Surface testing is essential
View product
05

GRAFF GEL

A solvent-based gel remover for paint, permanent ink, synthetic enamel, resin and graffiti.

  • Paint and spray-paint removal
  • Permanent ink and graffiti
  • Thick gel for vertical surfaces
  • Suitable for compatible natural stone
View product
06

FABER POULTICE

A powder thickener used with compatible stain-removal treatments to create a controlled poultice application.

  • Extends treatment contact time
  • Suitable for porous surfaces
  • Useful on vertical and detailed areas
  • Helps treat deeper contamination
View product
Professional working sequence

How to approach a stain-removal treatment

The exact dwell time, application thickness and removal procedure depend on the selected product.

01

Identify the surface

Confirm whether the material is marble, limestone, travertine, granite, sandstone, porcelain, terrazzo, concrete or another specialist surface.

02

Identify the likely stain source

Establish whether the contamination is rust, oil, grease, organic matter, pigment, paint, ink, resin or another substance.

03

Clean loose surface contamination

Remove dust, debris and removable surface dirt without spreading the stain deeper into the material.

04

Complete a controlled test

Test the product on a small area to confirm compatibility, reaction, dwell time and possible changes in appearance.

05

Apply the treatment accurately

Cover the stain and a small area around it. Apply the product evenly and follow the required application thickness.

06

Allow the recommended dwell time

Give the treatment enough time to work, but do not exceed the instructions or allow unsuitable residue to dry uncontrollably.

07

Remove and rinse the treatment

Remove dissolved contamination and product residue according to the instructions. Rinse or neutralise where required.

08

Allow the surface to dry before assessment

Porous stone can appear darker while damp. Allow it to dry fully before deciding whether further treatment is required.

Deep stain treatment

When and how to use a poultice system

A poultice is useful where a compatible liquid treatment needs to remain in contact with a porous surface for longer.

When to consider a poultice

For deeper or persistent contamination

  • Oil has penetrated below the surface.
  • A normal application dries too quickly.
  • The stained area is vertical or uneven.
  • Residual coloured shadowing remains.
  • The treatment needs extended controlled contact.
General working method

Create and remove the poultice carefully

  1. Confirm that the stain remover and powder thickener are compatible.
  2. Mix to the consistency required by the instructions.
  3. Apply evenly over the stain and slightly beyond its edge.
  4. Allow the specified reaction or drying period.
  5. Remove the poultice without damaging the surface.
  6. Rinse or neutralise where required.
  7. Allow the area to dry fully before assessing the result.
Avoid common treatment problems

Mistakes that can spread or worsen a stain

Using the wrong chemistry

A rust treatment, oil remover and graffiti remover are not interchangeable. Match the product to the contamination.

Ignoring stone sensitivity

Marble, limestone and travertine can react differently from granite, porcelain and concrete.

Scrubbing before extraction

Aggressive scrubbing can spread oil, pigment or softened paint into a larger area.

Judging the surface while damp

Damp porous stone often appears darker. Assess the result only after the material has dried properly.

Applying sealer over contamination

Sealing too early can trap remaining staining or moisture and make the problem more difficult to correct.

Expecting every stain to disappear once

Deep contamination may need repeated controlled treatments rather than one overly aggressive application.

Clean and protect the surface after stain removal

Once the stain has been treated, remove all product residue and allow the surface to dry completely. Complete any required general cleaning before applying an appropriate stone or concrete protection treatment.

View Stone Protection Guide
Unsure what caused the stain?

Ask AK Surface Solutions before applying a treatment

Send clear photographs and explain the material, location, age of the stain and its likely cause. We can help you identify a suitable stain remover, application method or poultice system.

Practical guidance

Stain Removal FAQs

Always test the selected treatment, follow its individual instructions and allow the surface to dry before assessing the final result.

First identify the surface and the likely source of the stain. Rust, oil, organic staining, paint and coloured shadowing require different treatments.

Consider what was spilled or placed in the area, whether metal was in contact with the surface and whether the material is acid-sensitive.

MAR GEL PLUS is the specialist rust stain remover normally considered for suitable natural stone, including acid-sensitive materials.

Complete a small test and follow the application instructions carefully before treating the full stain.

NO RUG is used for rust and oxidation staining on compatible mineral and hard surfaces.

Confirm surface compatibility before application, especially on polished or acid-sensitive stone.

NO OIL is designed for oil and greasy contamination on compatible stone and mineral surfaces.

Deep oil staining may require repeated applications or a poultice method. Allow the surface to dry fully between treatments so the remaining stain can be assessed accurately.

GRAFF GEL is a solvent-based gel formulated to soften and remove paint, permanent ink, synthetic enamel, resin and graffiti from compatible surfaces.

Remove the dissolved material carefully rather than spreading it across the surrounding surface.

Residual coloured staining may require a separate follow-up product such as NO MAC GEL, depending on the material and the type of remaining stain.

Allow the surface to dry first. Do not apply several different treatments together unless the system specifically instructs you to do so.

FABER POULTICE is a powder thickener used with compatible stain-removal products.

It helps create a thicker application that remains against the surface for longer and can be useful for deep stains, porous materials and vertical areas.

Not always. The result depends on the stain source, how long it has been present, the material porosity and how deeply it has penetrated.

A second controlled treatment is usually safer than one excessively aggressive application.

Porous stone and concrete normally look darker while damp. Water and treatment residue can temporarily resemble remaining staining.

Allow the surface to dry completely before judging the result or applying another treatment.

No. Remove all stain-removal residue, complete any required general cleaning and allow the surface to dry fully first.

Sealing while the surface is damp or contaminated can reduce performance and may trap remaining marks.

Yes. Send clear photographs and explain the surface, stain location, likely source and how long it has been present.

AK Surface Solutions can help you select a suitable rust remover, oil remover, coloured-stain treatment, graffiti remover or poultice system.

Professional Stain Removal Guide

Professional Stone, Tile and Concrete Stain Removal Guide

Professional guidance for identifying and treating rust, oil, grease, coloured marks, organic contamination, paint, graffiti and deep-set staining on natural stone, tile, concrete and other specialist mineral surfaces.

Rust and oxidation Oil and grease stains Organic and coloured marks Paint and graffiti removal
Suitable surfaces may include:
Marble Limestone Travertine Granite Sandstone Terrazzo Porcelain Ceramic tile Concrete Brick
Start with stain identification

The correct treatment depends on what caused the stain

Professional stain removal should begin by identifying the surface, the likely source of the stain and how deeply the contamination has penetrated.

Rust requires a different treatment from oil. Paint and graffiti require a different chemistry from organic staining, tannin, food, drink or coloured shadowing.

The material is equally important. A treatment that may be suitable for granite, porcelain or concrete may be too aggressive for marble, limestone or travertine.

Complete a small test before treating the full area. Deep stains may require more than one application, a poultice system or a second treatment for residual shadowing.

Common contamination types

Identify whether the stain is metallic, oily, organic or synthetic

The visible colour alone does not always confirm the source. Consider what was placed, spilled or installed in the area.

Metallic staining

Rust and oxidation

Rust can be caused by metal furniture, fixings, tools, irrigation water, fertilisers or metal contamination within or beneath the surface.

  • Orange or brown marks
  • Metal contact points
  • Oxidation around fixings
  • External paving contamination
Oily contamination

Oil, grease and wax

Oil can penetrate deeply into porous stone and concrete, often creating a darker patch that remains after normal surface cleaning.

  • Cooking oil
  • Motor oil
  • Grease and lubricants
  • Wax or oily product residue
Organic staining

Food, drink, leaves and tannin

Organic stains may be caused by coffee, wine, food, leaves, flowers, soil, wood, plant pots or other natural materials.

  • Brown or coloured shadowing
  • Leaf and plant-pot marks
  • Food and drink spills
  • Tannin and organic residue
Synthetic contamination

Paint, ink and graffiti

Synthetic coatings normally require a solvent-based remover capable of softening paint, ink, resin or graffiti without unnecessary damage to the substrate.

  • Permanent ink
  • Spray paint
  • Synthetic enamels
  • Resins and coating residue
Coloured residue

Residual marks and shadowing

A first treatment may remove the main source while leaving colour or shadowing within the pores of the material.

  • Remaining coloured outlines
  • Organic shadowing
  • Dye or pigment traces
  • Follow-up treatment required
Deep-set contamination

Stains requiring a poultice

Some stains require extended contact with the treatment. A poultice can hold compatible chemistry against the surface and help draw contamination from porous material.

  • Deep oil staining
  • Persistent coloured marks
  • Vertical or detailed areas
  • Longer controlled contact time
Quick selection guide

Match the stain and surface to the treatment

Stain type
Surface consideration
Suggested product or system
Rust
Marble, limestone, travertine or another acid-sensitive stone
MAR GEL PLUS, subject to testing and product instructions
Rust and oxidation
Suitable mineral or acid-resistant surfaces
NO RUG after confirming surface compatibility
Oil and grease
Porous natural stone, concrete or mineral surfaces
NO OIL, with repeated treatment or poultice where required
Coloured or organic staining
Compatible stone, tile and mineral surfaces
OXIDANT or NO MAC GEL according to the stain and surface
Paint, ink or graffiti
Compatible natural stone and hard surfaces
GRAFF GEL, followed by residue and shadow assessment
Deep-set stain
Porous or vertical surface requiring extended contact
Compatible stain remover thickened with FABER POULTICE
Professional stain removers

Select the product according to the stain and material

Each card links directly to the relevant AK Surface Solutions product page. Always review the full instructions before use.

01

MAR GEL PLUS

A specialist gel treatment for rust staining on natural stone, including acid-sensitive materials where suitable.

  • Targeted rust stain treatment
  • Gel consistency for controlled application
  • Suitable for horizontal or vertical areas
  • Test before treating the full surface
View product
02

NO RUG

A professional rust and oxidation stain remover for compatible mineral and hard surfaces.

  • Rust and oxidation marks
  • External and internal treatment
  • Use only on compatible surfaces
  • Complete a test area first
View product
03

NO OIL

A solvent-based stain remover designed for oil and greasy contamination on suitable stone and mineral surfaces.

  • Cooking and motor oil stains
  • Grease and lubricant residue
  • Suitable for deep porous contamination
  • Repeat treatment may be required
View product
04

OXIDANT

A specialised treatment for compatible coloured, organic or oxidation-related staining.

  • Organic and coloured marks
  • Residual stain treatment
  • Professional targeted application
  • Surface testing is essential
View product
05

GRAFF GEL

A solvent-based gel remover for paint, permanent ink, synthetic enamel, resin and graffiti.

  • Paint and spray-paint removal
  • Permanent ink and graffiti
  • Thick gel for vertical surfaces
  • Suitable for compatible natural stone
View product
06

FABER POULTICE

A powder thickener used with compatible stain-removal treatments to create a controlled poultice application.

  • Extends treatment contact time
  • Suitable for porous surfaces
  • Useful on vertical and detailed areas
  • Helps treat deeper contamination
View product
Professional working sequence

How to approach a stain-removal treatment

The exact dwell time, application thickness and removal procedure depend on the selected product.

01

Identify the surface

Confirm whether the material is marble, limestone, travertine, granite, sandstone, porcelain, terrazzo, concrete or another specialist surface.

02

Identify the likely stain source

Establish whether the contamination is rust, oil, grease, organic matter, pigment, paint, ink, resin or another substance.

03

Clean loose surface contamination

Remove dust, debris and removable surface dirt without spreading the stain deeper into the material.

04

Complete a controlled test

Test the product on a small area to confirm compatibility, reaction, dwell time and possible changes in appearance.

05

Apply the treatment accurately

Cover the stain and a small area around it. Apply the product evenly and follow the required application thickness.

06

Allow the recommended dwell time

Give the treatment enough time to work, but do not exceed the instructions or allow unsuitable residue to dry uncontrollably.

07

Remove and rinse the treatment

Remove dissolved contamination and product residue according to the instructions. Rinse or neutralise where required.

08

Allow the surface to dry before assessment

Porous stone can appear darker while damp. Allow it to dry fully before deciding whether further treatment is required.

Deep stain treatment

When and how to use a poultice system

A poultice is useful where a compatible liquid treatment needs to remain in contact with a porous surface for longer.

When to consider a poultice

For deeper or persistent contamination

  • Oil has penetrated below the surface.
  • A normal application dries too quickly.
  • The stained area is vertical or uneven.
  • Residual coloured shadowing remains.
  • The treatment needs extended controlled contact.
General working method

Create and remove the poultice carefully

  1. Confirm that the stain remover and powder thickener are compatible.
  2. Mix to the consistency required by the instructions.
  3. Apply evenly over the stain and slightly beyond its edge.
  4. Allow the specified reaction or drying period.
  5. Remove the poultice without damaging the surface.
  6. Rinse or neutralise where required.
  7. Allow the area to dry fully before assessing the result.
Avoid common treatment problems

Mistakes that can spread or worsen a stain

Using the wrong chemistry

A rust treatment, oil remover and graffiti remover are not interchangeable. Match the product to the contamination.

Ignoring stone sensitivity

Marble, limestone and travertine can react differently from granite, porcelain and concrete.

Scrubbing before extraction

Aggressive scrubbing can spread oil, pigment or softened paint into a larger area.

Judging the surface while damp

Damp porous stone often appears darker. Assess the result only after the material has dried properly.

Applying sealer over contamination

Sealing too early can trap remaining staining or moisture and make the problem more difficult to correct.

Expecting every stain to disappear once

Deep contamination may need repeated controlled treatments rather than one overly aggressive application.

Clean and protect the surface after stain removal

Once the stain has been treated, remove all product residue and allow the surface to dry completely. Complete any required general cleaning before applying an appropriate stone or concrete protection treatment.

View Stone Protection Guide
Unsure what caused the stain?

Ask AK Surface Solutions before applying a treatment

Send clear photographs and explain the material, location, age of the stain and its likely cause. We can help you identify a suitable stain remover, application method or poultice system.

Practical guidance

Stain Removal FAQs

Always test the selected treatment, follow its individual instructions and allow the surface to dry before assessing the final result.

First identify the surface and the likely source of the stain. Rust, oil, organic staining, paint and coloured shadowing require different treatments.

Consider what was spilled or placed in the area, whether metal was in contact with the surface and whether the material is acid-sensitive.

MAR GEL PLUS is the specialist rust stain remover normally considered for suitable natural stone, including acid-sensitive materials.

Complete a small test and follow the application instructions carefully before treating the full stain.

NO RUG is used for rust and oxidation staining on compatible mineral and hard surfaces.

Confirm surface compatibility before application, especially on polished or acid-sensitive stone.

NO OIL is designed for oil and greasy contamination on compatible stone and mineral surfaces.

Deep oil staining may require repeated applications or a poultice method. Allow the surface to dry fully between treatments so the remaining stain can be assessed accurately.

GRAFF GEL is a solvent-based gel formulated to soften and remove paint, permanent ink, synthetic enamel, resin and graffiti from compatible surfaces.

Remove the dissolved material carefully rather than spreading it across the surrounding surface.

Residual coloured staining may require a separate follow-up product such as NO MAC GEL, depending on the material and the type of remaining stain.

Allow the surface to dry first. Do not apply several different treatments together unless the system specifically instructs you to do so.

FABER POULTICE is a powder thickener used with compatible stain-removal products.

It helps create a thicker application that remains against the surface for longer and can be useful for deep stains, porous materials and vertical areas.

Not always. The result depends on the stain source, how long it has been present, the material porosity and how deeply it has penetrated.

A second controlled treatment is usually safer than one excessively aggressive application.

Porous stone and concrete normally look darker while damp. Water and treatment residue can temporarily resemble remaining staining.

Allow the surface to dry completely before judging the result or applying another treatment.

No. Remove all stain-removal residue, complete any required general cleaning and allow the surface to dry fully first.

Sealing while the surface is damp or contaminated can reduce performance and may trap remaining marks.

Yes. Send clear photographs and explain the surface, stain location, likely source and how long it has been present.

AK Surface Solutions can help you select a suitable rust remover, oil remover, coloured-stain treatment, graffiti remover or poultice system.