How to Remove Paint From Any Surface

The sander comes out, three layers of gloss are sitting on a Victorian skirting board, and nobody has asked what is underneath the bottom coat. That is how most paint removal jobs start. It is also how a straightforward afternoon turns into something you would rather not have breathed.

One rule governs the whole of this page. Match the method to the surface and to the age of the paint, in that order. Get the first part wrong and you damage something. Get the second part wrong and you can make yourself ill.

So the checks come first.

Before you start: two checks that take five minutes

Could this paint contain lead?

Assume yes in any UK property decorated before 1992, and treat it as near certain in anything from the first half of the twentieth century.

White lead was restricted in British decorative paint in 1992. Before that it was ordinary, and between roughly 1930 and 1955 some paints carried as much as half their volume in white lead compounds. Those layers are still sitting under later coats in a great many houses. Our guide to restoring a Victorian house covers the wider picture in period property.

Lead paint that is intact and undisturbed is not doing much harm. The danger is in how you remove it. The most hazardous processes are the ones that put lead into the air, and that means dry sanding and hot heat guns. Dust and fume are easily inhaled, difficult to contain, and they settle everywhere.

A swab test kit from a decorating merchant costs a few pounds and takes a minute. Test every layer rather than just the top one, by cutting a small notch down to the substrate.

Where lead turns up, the safer routes are wet methods, chemical stripping and infrared, all covered below. Chemical stripping brings its own skin absorption risk, so gloves stop being optional.

Could this be a textured coating containing asbestos?

Artex and similar textured coatings applied before 2000 can contain chrysotile, or white asbestos. Looking at it tells you nothing.

Left alone and in sound condition, it is low risk. The risk climbs sharply the moment it is sanded, scraped, drilled or broken up.

So do not sand it, do not dry scrape it, and do not drill into it until it has been tested. A sample sent to a UKAS accredited laboratory settles the question for a modest fee. If you disturb some by accident, resist the urge to tidy up: sweeping spreads the fibres and a domestic vacuum spreads them further.

Where asbestos is confirmed, some textured coating work is non-licensed, but it still needs proper training, controlled wetting, the right respiratory protection and correct disposal. Most homeowners are better off skimming over it or having a plasterer deal with it. Our plasterers in Nottingham handle this regularly.

The kit that actually matters

• A P3 respirator, not a paper dust mask. A dust mask does nothing useful against lead dust or solvent vapour.
• Goggles, particularly around caustic products, which do not forgive a splash.
• Gloves rated for the product. Nitrile for most strippers, heavy chemical gloves for caustic.
• Dust sheets and masking, taped down rather than laid loose, with proper floor protection where the surface underneath matters.
• Ventilation, and nobody else in the room. Keep children and anyone pregnant well away from lead work.

Two questions answered. Now the method becomes straightforward.

The five ways to remove paint

Chemical strippers

The UK legal position is worth knowing, because most advice online ignores it. Dichloromethane strippers, sold in the United States as methylene chloride and recommended across a great deal of American content, cannot legally be sold to the general public in the UK. The restriction came in from 2010 with full effect by 2012 and is retained under UK REACH. Professionals need an HSE certificate number to buy them at all.

What you can buy here comes in two groups.

Benzyl alcohol based strippers. Barrettine Paint Panther, Liberon, Rustins, Polyvine and similar. Slower than the old solvent products and far less unpleasant to work with. Effective on most household paint and varnish, less convincing on industrial lacquers and powder coatings.

Caustic poultice systems. Peelaway and its equivalents. A thick alkaline paste spread over the surface, covered with a laminated blanket, left for hours or days, then lifted off with the paint attached. Genuinely good on multiple layers and on mouldings, and useful over lead paint because it stays wet and takes the whole build-up in one go rather than generating dust.

Two mistakes account for most stripper failures. People do not leave the product on long enough, and people skip the neutralising step after a caustic product, which lets the residue attack the new finish months down the line.

Heat guns

Fast on timber, cheap, and the wrong choice wherever lead is suspected. Heat sufficient to blister old paint is also sufficient to release lead as fume, which is worse than dust, because you cannot see it at all.

Even without lead, two cautions apply. Scorch marks in bare timber are permanent short of sanding them out. And a heat gun played along a skirting board can ignite debris in the void behind it, producing a fire that starts an hour after you have packed up.

Infrared strippers

The under-used option, and the sensible one on old paint.

An infrared stripper warms the paint film and the substrate at a far lower temperature than a heat gun, typically around 200°C, well below the point at which lead begins to vaporise. Paint softens and lifts in sheets rather than flakes, the timber underneath stays intact, and there is no dust.

It is slower than a heat gun and the units cost more, although hire is easy enough. On a period house full of original joinery, it is usually the right tool.

Sanding and abrasives

Effective, and the last thing to reach for on paint of unknown age.

Once lead is ruled out, use a sander with dust extraction rather than a bag, work through the grits instead of jumping, and keep a detail sander for mouldings. Where there is any doubt at all, wet abrasive methods keep the dust down.

Never dry sand a textured coating. See above.

Steam and hot water

Superheated low-pressure steam is the professional answer on masonry, and a wallpaper steamer softens emulsion on plaster surprisingly well. Both are wet processes, which is exactly what you want when the paint history is uncertain.

Which method for which job

Method also depends on what sits underneath, which brings us to surfaces.

Removing paint from wood

Interior joinery

Doors, skirting, architrave and staircases are the commonest job in a British house, and usually the oldest paint in it.

Chemical stripper or infrared, in most cases. Work in sections, keep a shave hook for the mouldings and a flat scraper for the flats, and pull the scraper rather than pushing it so you do not dig into the grain. Sand lightly once everything is off and the surface is dry, not before.

Expect to go round twice. Old paint sits deep in the profile of a moulding and the first pass rarely gets all of it.

Should you have doors dipped?

Caustic dipping is cheap, fast and hard on a door. Worth understanding the trade before you drop six panelled doors at a unit on an industrial estate.

The tank attacks the animal glue in traditional joints, so a door can come back with the joints loosened and the panels rattling. It raises the grain. And caustic residue left in the timber leaches out over the following months, which is a common reason a beautifully stripped door refuses to hold paint a year later.

On a plain modern door, glued and screwed, it is usually fine. On original Victorian or Georgian joinery it is a gamble, and stripping in place with infrared costs more while keeping the door intact.

Exterior timber

Windows, doors and fascias face the same choices with two additions. Work dry and out of direct sun, so strippers do not flash off before they have done anything. And be realistic about whether stripping is the right call, because badly weathered softwood sometimes needs replacing rather than reviving.

For fences and outbuildings, stripping is rarely worth the effort. Clean back the loose material and recoat. Our guide to the best fence paint covers what holds up outdoors.

Floorboards

A drum sander hired for the day, with an edging sander for the perimeter. Lead check first, always, because painted boards in an old house are precisely where it turns up.

Varnish and stain

Varnish behaves much like paint and responds well to benzyl alcohol strippers. Stain is a different problem, because it has soaked into the fibres rather than sitting on top. Sanding is the only reliable answer, and even then a dark stain in open-grained timber such as oak may never come out completely. Knowing the type of wood sets expectations before you start.

Removing paint from brick and masonry

Here is where the most damage gets done, almost always with good intentions.

Why a pressure washer is the wrong tool

Brick has a fire skin, the kiln-hardened outer surface formed during firing. It keeps rain out and frost damage at bay, and it is perhaps a millimetre thick.

A domestic pressure washer takes it off along with the paint. What you are left with is a soft, open, absorbent face that drinks water. Come the first hard frost, the water in those pores freezes, expands and takes the surface of the brick with it. That is spalling, and it does not grow back.

Grit blasting does the same thing faster. Wire brushing does it more slowly. All three are common approaches to painted brickwork, and all three trade a cosmetic problem for a structural one.

What actually works

• Low-pressure superheated steam. Water heated to around 150°C, applied at low pressure. Temperature does the work instead of force, which is why conservation officers favour it. The gentlest effective option on historic brick.
• Poultice and gel systems. A paste applied thickly, left to work, then removed with the paint. Slow, controllable, good on detail.
• Damp abrasive systems. A low-pressure mix of air, water and fine abrasive. Far gentler than dry grit blasting while still shifting resilient coatings.
• Dry ice blasting. Excellent and mess-free on interior brick, though the cost reflects the logistics.

Almost all of these are specialist processes rather than weekend jobs. On a whole elevation, that is simply the honest answer.

Listed buildings and conservation areas

Removing paint from a historic façade can require listed building consent, and conservation area rules may apply. Ask the council before anyone sets up a lance against the wall, not afterwards.

Afterwards

Let the wall dry out completely, which takes longer than people expect following a wet process. Then leave it breathable. A non-breathable sealant on newly stripped brick traps moisture inside the wall and creates a slower version of the problem you have just solved. If a coating is wanted, it needs to be vapour permeable, and the same principle governs any rendering work that follows.

When to leave painted brick alone

Sometimes the paint is the only thing holding a poor-quality or already-spalled brick together, and removing it exposes damage that then needs repointing or replacement brickwork. If the wall was painted decades ago and the paint is sound, doing nothing is a legitimate answer.

Removing paint from metal

Radiators, railings and gates. Chemical stripper is the controlled option. A wire wheel in an angle grinder is faster and throws material everywhere, so it belongs outdoors with full face protection. Strip radiators cold and drained, never warm.

Old railings and cast iron carry the same lead risk as joinery. Test before you take a grinder to Victorian ironwork.

Rust underneath. Whatever comes off, deal with what is revealed. Wire back to bright metal, treat with a rust converter or a phosphoric acid product, then prime promptly. Bare steel starts oxidising within hours in British weather.

Powder coating shrugs off ordinary household strippers almost entirely. It needs specialist chemical treatment or blasting, and on garden furniture or gates it is often cheaper to have the item professionally stripped and recoated than to fight it.

Removing paint from concrete, render and floors

Garage floors, driveways and paths.

Degrease first, because oil and paint together defeat most strippers. Then use a poultice or gel product made for masonry, give it proper dwell time, and scrape rather than grind.

Avoid acid etching as a removal method. It is meant for profiling clean concrete before a coating, not for stripping paint, and it will pit the surface without shifting much of the film.

For large slabs, floor grinding with vacuum extraction is the professional route.

Removing paint from uPVC, plastic and glass

uPVC windows and doors. The danger here is solvent damage. Acetone, cellulose thinners and aggressive strippers will craze, soften or permanently dull the plastic, and there is no repair for it. Start with warm soapy water and a plastic scraper. Methylated spirit on a cloth handles most emulsion splashes. Test anything stronger somewhere hidden, such as the underside of a sill, and buy a product specifically labelled as uPVC safe.

Glass. The easiest job on this page. A new blade in a scraper, held at a shallow angle, glass kept wet throughout. Dry scraping is what causes scratches. Take care on toughened or coated glass, where a blade can leave marks, and test in a corner first.

Paint on things that are not walls

Clothes and fabric. Speed matters more than technique. Water-based emulsion: rinse from the back with cold water, work in washing-up liquid, then wash normally. Oil-based gloss: dab white spirit onto the reverse of the fabric with a cloth underneath to absorb it, blot rather than rub, then wash. Dried gloss on fabric is often permanent.

Carpet. Blot, never rub, and work from the outside of the mark inwards so you do not spread it. Emulsion lifts with warm soapy water and patience. Oil-based needs white spirit on a cloth, tested in a hidden corner first, because it can affect some dyes and backings.

Skin and hair. Emulsion washes off with soap and warm water. Gloss comes away with baby oil, olive oil or a proprietary hand cleaner, worked in and then washed off. Do not use white spirit, thinners or stripper on skin. It is absorbed, it is unnecessary, and it hurts.

Brushes and rollers. Water and detergent for emulsion, white spirit or a brush cleaner for oil-based. Work the bristles against your palm rather than the sink, spin them out, store them flat.

Disposing of paint and stripper safely

Never pour paint or stripper down a drain, into a gully or onto ground. It ends up in watercourses.

Liquid paint should not go into household bins either. Harden it off first by leaving the tin open, or by stirring in sand, soil, sawdust or a proprietary paint hardener. Once solid, most councils accept it in general waste, though rules vary and it is worth checking.

Household waste recycling centres take paint, and many run reuse schemes for usable tins.

Chemical strippers, and any waste from stripping lead paint, are a separate matter. Both count as hazardous waste. Bag scrapings and dust sheets from lead work separately, seal them, and contact your council for the correct route rather than putting them in the bin. Our notes on minimising construction waste cover the wider disposal picture on a renovation.

When to bring somebody in

Some of this is a weekend. Some of it is not.

Get help for confirmed lead paint over large areas, where containment and disposal matter more than the stripping. For textured coatings, where testing and controls come first. For whole elevations of masonry, where the equipment is specialist and the damage from getting it wrong is permanent. For listed buildings, where consent and method both need to be right. And for any job where the cost of stripping starts closing on the cost of replacing the item.

Worth doing those sums early rather than three days in. Our guide to the steps to take before a home renovation covers sequencing, and what it costs to paint a room gives you the other half of the budget.

How we handle it

Most of the paint stripping we come across sits inside a bigger job. A period house being brought back into use, a room being replastered, a wall being repaired behind decades of coatings.

The approach is the same every time. Establish the age of the building, test before disturbing anything, then choose the gentlest method that will actually work. Slower on day one, and considerably cheaper by the end.

If you are looking at a period property in Nottingham and are not sure what is under the paint, have a look at our home renovation work or get in touch.

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