How to Clean and Care for an Acrylic Canvas Painting

The short answer: dust it lightly and often with a soft brush, never put water or cleaning products on it, and keep it off a sunlit wall. That covers most of what a painting needs for the rest of its life.

The longer answer matters if your painting is acrylic, because acrylic behaves in a way that most care advice gets wrong.

This matters before you touch anything, because a lot of the cleaning advice you will find was written for a different object.

A canvas print is an image printed onto canvas, usually with a protective coating over the top. That coating is what makes it possible to wipe one with a damp cloth or a little soapy water, which is the advice you will see repeated in most places.

A hand-painted canvas has no such coating unless someone has varnished it. The surface you are touching is the paint itself. Soap and water on bare acrylic can lift pigment, leave residue in the texture, and start mould in the weave underneath.

If you are not sure which you have, look at the surface from the side under a lamp. A painting has raised ridges where the brush loaded and lifted, and the texture is uneven and directional. A print is flat, and any texture repeats evenly because it belongs to the canvas weave rather than the image.

Note: Everything below is written for a hand-painted canvas. Our own hand-painted Himalayan scenes are all in that category, painted in acrylic with no coating over the top, so treat the surface as bare paint.

Two things about acrylic paint explain nearly every rule in this guide.

• It never fully hardens. Acrylic is thermoplastic, which means it softens as it warms. On a hot day, or on a wall that catches afternoon sun, the surface of an acrylic painting becomes very slightly tacky. Airborne dust that lands on a warm acrylic surface does not sit loose on top of it. It sticks.
• The paint film is porous. As acrylic dries, water evaporates out of it and leaves microscopic voids behind. The surface you are looking at is not sealed. It is full of tiny openings that soil more easily and hold dirt more stubbornly than a non-porous film would.

Put those together, and you get the central rule of acrylic care: dust regularly and gently, because dirt that settles in is genuinely difficult to get back out. A painting dusted every few weeks stays easy. A painting left for five years may need a conservator to do what dusting would have done for free.

We ship rolled, because a frame can crack in transit and a cracked frame damages the canvas it holds. So the first thing you will do is unroll it, and this is where most avoidable damage happens.

Let it acclimatise for a full day. Leave the tube unopened in the room where the painting will live. Canvas and paint both respond to temperature and humidity, and a canvas that goes from a cold delivery van to a warm room and is immediately forced flat is a canvas you are asking to crack.

Wash your hands, or wear gloves. Conservators use cotton or nitrile gloves for a specific reason: the natural oils on your fingers leave marks that then attract and hold dust. On a porous acrylic surface, a fingerprint is not just a smudge; it is a patch that collects dirt faster than the paint around it. Take off rings and watches too.

Unroll it face down on a clean, flat, dry surface. Work slowly. If you meet resistance, stop and give it more time rather than more force.

Then flatten it without force. Two methods work:

• The reverse roll. Loosely roll the canvas the opposite way, painted side facing outward, and leave it a few minutes. No heat, almost no risk. Always start here.
• Weighting. Lay it face up, cover it with clean acid-free tissue, and rest even weights along the edges. Books are fine. Several hours, or overnight for a stubborn curl. Never put weight directly onto bare paint.

If the curl still fights you, warm the back very slightly with a hair dryer on its lowest setting, kept moving and held well back. Warm, not hot, and never aimed at the painted side.

Do not press the canvas, front or back. This is the one instruction conservators repeat most. Pressing a canvas, even to smooth a curl, produces a distinctive circular crack pattern called spider craquelure. It is permanent, and it looks exactly like what it is.

Once flat, you have three sensible options, and any framer can do all of them.

• Stretched over bars is the standard, with the canvas wrapping a wooden frame. 
• Float mounting sets it inside a frame with a visible gap around the edge. 
• Clip hanging at top and bottom leaves it unstretched and loose, which is informal and completely reversible.
• Use a framer rather than doing it yourself unless you have stretched canvas before. Stretching pulls the fabric tight over bars, and pulling unevenly puts diagonal creases into the paint that never come out.

Dust every few weeks. That is more often than most people expect, and given how acrylic behaves, it is the whole game.

Work dry first, always. The professional order of preference runs from least contact to most:

1. Compressed air is held back well, which removes loose dust without touching the surface at all. Best for heavily textured work.
2. A soft brush, sable or similar, kept only for this job. Use light strokes in one direction.
3. A soft cloth, only on smoother areas.

Use a brush, not a cloth, on a textured painting. A hand-painted canvas has raised ridges where the brush loaded and lifted. Dust does not sit on top of those ridges; it collects in the valleys beside them. A cloth dragged across the surface skims the high points and misses the low ones entirely. A soft brush reaches in.

Hold a vacuum nozzle nearby while you brush, catching the dust as it lifts so it does not simply resettle. The nozzle must never touch the painting. Suction against the surface can pull at texture and lift loose paint.

• Water. Not a damp cloth, not a wrung-out sponge. Moisture can lift acrylic and can start mould in the weave.
• Household sprays and cleaners. Glass cleaner, all-purpose spray, furniture polish, anything with ammonia or alcohol.
• Solvents. White spirit, acetone, nail varnish remover. These dissolve acrylic.
• Erasers. These appear in a lot of online advice, and they are genuinely bad on acrylic. Eraser crumbs pack into the pores of the paint film and cannot be got out again.
• Bread, potato, or saliva. You will find all three recommended online. Saliva swabbing is, in fact, a real conservation technique, but it is performed by trained people under magnification on tiny areas with controlled pressure. It is not a method for cleaning your own painting, and the other two just leave residue that feeds mould.
• A vacuum nozzle directly on the surface. Near it, yes. On it, no.

If a painting is genuinely dirty rather than dusty, stop and get professional advice. That conversation costs far less than repairing what a cleaning attempt does.

Almost everything on this list is recoverable. Light damage is not. It is cumulative, it is permanent, and no conservator can put faded pigment back.

The museum display standard for oil, tempera and acrylic paintings is 200 lux, with ultraviolet held to 75 microwatts per lumen. You are never going to meter your living room, so here is the version you can actually use:

• Direct sun crossing that wall at any point in the day? Pick a different wall.
• Bright indirect daylight? Fine. This is what you want.
• Artificial light? LED over unfiltered fluorescent, for the same ultraviolet reason.

If that wall is genuinely your only option, you have three fixes, and any one of them does most of the work: a sheer blind, a UV-filtering window film, or simply closing the curtains during the hours the sun hits that side of the house.

Conservation bodies broadly agree, and the interesting part is not the target but the tolerance.

Above 70% relative humidity you are into mould territory, and that is the number worth remembering because it is the one that turns a slow problem into a fast one.

Above a radiator, a stove or a fireplace. All three sit in a rising column of hot, dry air. A kitchen adds airborne grease, and an open fire adds soot.

In a bathroom. Steam, temperature swings and standing damp, all at once.

Flat against a damp exterior wall. Moisture gets trapped behind the canvas where you cannot see it, and mould starts on the back rather than the front. If it has to go there, fit small cork or foam spacers behind the frame corners to hold it about 10 mm off the wall so air can circulate. Conservators use Plastazote for this; cork pads from a hardware shop do the same job.

Three things decide whether a painting hangs well or annoys you for years.

Use two hooks, never one, for anything wide. A single central hook lets a long canvas pivot every time a door closes, and you will spend its whole life straightening it. Set the two hooks level, roughly a third in from each end. They hold the painting still and share the weight between them.

Get the height right, and you will stop noticing it, which is the goal:

• Centre of the painting at about eye level for someone standing.
• Above a sofa or headboard, roughly a hand's width between the top of the furniture and the bottom of the painting.

Check the fixings once a year. This matters most on plasterboard, and most of all for a large piece.

• A slack or wavy canvas is common and usually easy. A framer can re-tension it, often just by adjusting the small wooden wedges in the stretcher corners.
• A dent or push mark from a knock behind will frequently relax by itself once humidity is stable. Do not push it back from the front.
• Surface scuffs are best left alone. Rubbing removes paint.
• Circular crack patterns mean something pressed on the canvas. It cannot be reversed at home.
• Flaking or lifting paint needs a conservator, and needs one before the flake detaches. Keep the painting flat and undisturbed until then.
• Mould spots mean the room is wrong, so fix the environment first. Do not wipe them. Wiping drives spores into the weave and spreads the problem.

Everything on this list is recoverable except two things: pigment faded by sunlight and paint lost to a home cleaning attempt. Those are the two this guide keeps returning to, and they are the two that are entirely within your control.

1. Can I clean a canvas painting with water?

No. Water can lift acrylic paint, and moisture held in the canvas weave can start mould. Dry Clean, and if dry methods are not enough, speak to a conservator rather than escalating to something wet.

2. I found advice saying to use mild dish soap and warm water. Is that safe?

That advice is written for canvas prints, which carry a protective coating over the image. A hand-painted canvas does not have one unless it has been varnished, so soap and water go straight onto bare paint. On acrylic specifically, which is porous and slightly soft, that risks lifting pigment and leaving residue down in the brush texture where you cannot get it out. Stay dry.

3. How do I tell a painting from a print?

Look across the surface with light coming from one side at a low angle. A painting has raised ridges that throw small shadows, running in the direction the brush moved. A print is flat, and whatever texture it has repeats evenly because it is the weave of the canvas rather than the image.

4. How often should I dust a painting?

Every few weeks, lightly. Acrylic softens as it warms, and its surface is porous, so dust left in place can work into the paint film. At that point, it stops being dust sitting on a painting and becomes part of the painting.

5. Does a canvas painting need glass over it?

No. Canvas is meant to breathe, and glass traps moisture against the surface. This is one of the real differences between a painting on canvas and a work on paper, which does need glazing.

6. My painting arrived rolled and will not lie flat. What now?

Give it time rather than force. Leave it in the room for a full day, unroll it face down, then reverse-roll it loosely or weight the edges with acid-free tissue overnight. Full method above.

7. Will the colours fade?

Acrylic holds its colour for decades and does not yellow with age. What fades any painting is ultraviolet light, so the answer depends entirely on the wall you choose. Away from direct sun, fading is not something you will see.

8. Is it safe in a humid country?

Yes, with two habits. Keep it off exterior walls with an air gap behind, and check the back of the canvas once a season. Steady humidity is manageable. Sudden swings and anything sustained above 70% are what cause trouble.

9. What is the single most useful thing I can do?

Hang it out of direct sunlight and dust it lightly every few weeks. Those two habits prevent almost every problem in this guide.

We paint in acrylic on stretched cotton in Pokhara, which is a genuinely demanding climate for canvas. Relative humidity here averages around 65% at its driest in April and climbs to roughly 90% in July, going above that on heavy monsoon days. For four months of the year, the air sits above the 70% threshold that conservators flag for mould, and then winter arrives and dries everything out again.

We tell you that because it is the reason we are specific about humidity rather than vague. We have watched what damp does to canvas and what a dry winter does to paint, and the guidance above is what actually holds up.

If you are ever in Nepal, you can visit the workshop in Pokhara and see the canvases being painted, dried, and packed.  If you cannot get here, the people behind the workshop are worth knowing anyway, since the painters are part of the same artisan community that spins and weaves everything else we make.  

If you also own cashmere or wool from us, the rules for those are completely different. There is a separate cashmere care guide.

And if you are still choosing a piece, our guide to Himalayan canvas paintings explains what is in each one and how to pick a size, or you can browse the paintings collection.