Oil paint does not rinse out. Run a loaded brush under the tap and the water beads straight off the bristles, leaving the pigment sitting up inside the ferrule where it dries hard and splays the hairs for good.
This guide walks through how to clean oil based paint brushes two ways, with a drying oil or with odorless mineral spirits, and both take about 10 to 20 minutes. You will also see how to store used solvent instead of binning it, how to handle oily rags safely, and how to bring a rock-hard brush back to life.
Key Takeaways
- Break the paint down first: oil paint dissolves in odorless mineral spirits (like Gamsol) or a drying oil (linseed, safflower, walnut, poppy), never in water.
- Soap second: lather the bristles with artist soap or mild dish soap in lukewarm water until the suds come up white, which lifts out the leftover solvent or oil.
- Oily rags can ignite on their own: keep used rags and paper towels in a covered metal container, soaked in water, and take them out of the house daily.
- Dry flat or bristles down: a brush left standing bristles-up wicks liquid into the ferrule, swelling the handle and loosening the glue that holds the hairs.
Can You Clean Oil Paint Brushes With Water?
No. Oil and water do not mix, so water alone cannot clean an oil paint brush. The tap water simply rolls off the oily bristles and leaves the paint exactly where it was.
You need something that dissolves oil first: a solvent, such as odorless mineral spirits, or a drying oil, such as linseed. Only once the pigment is broken down and wiped away does soap and water have anything to grab onto.
When to Clean vs. When to Rest
You don’t always need a deep clean. If you plan to paint again within 24 to 48 hours, you can “rest” your brushes instead.
Wipe as much paint as possible onto a paper towel. Then dip the bristles into a slow-drying oil, such as poppy seed or safflower oil. Linseed oil works in a pinch, but it cures faster, so it is the wrong choice if the brush will sit for a couple of days.
Lay the oiled brush on your drying rack. Next session, wipe off the excess oil and carry on. Anything longer than a couple of days needs the full clean below, or the paint will set in the heel of the brush where you cannot see it.
Method 1: The Solvent-Free Clean (Linseed Oil)
If you paint in a small room, share the space with kids or pets, or react badly to fumes, oil cleaning is the safer route. It takes more wiping than solvent does, but it conditions the hairs instead of stripping them.
Use a drying oil: linseed, safflower, walnut, or poppy. These oils are strong wetting agents, which is why they surround pigment particles and pull them out of the bristles (1). Skip any grocery-store oil that lists Vitamin E or tocopherols on the label, as those additives slow drying and can linger in your paint film.
- Time: 15-20 minutes
- Difficulty: Beginner
What You’ll Need
- A drying oil: linseed oil, safflower, walnut, or poppy (plain vegetable or canola oil only if you wash the brush out with soap right away)
- Paper towels or paint rags
- Old cup or jar
- Artist hand soap (like The Master’s Artist Soap)
1. Remove Excess Paint
Before any liquid touches the brush, get the bulk of the paint off. Wrap the ferrule (the metal collar) and the bristles in a paper towel, squeeze gently, and pull toward the tip. Repeat until the brush stops leaving heavy marks on the towel.
2. Submerge and Agitate
Pour enough oil into your jar to cover the brush head, then dip the brush and press it gently against the side or bottom so the clean oil works into the middle of the bristles. The fresh oil displaces the pigment-loaded paint.
Lift the brush, wipe it on a rag, and repeat the dip-and-wipe cycle until the oil squeezed out of the hairs runs close to clear. If you use a jar with a cleaning coil, drag the bristles sideways across the coil rather than stabbing straight down, which splays them permanently.
3. The Soap Phase
The pigment is gone, but the oil is not. Wet the brush in lukewarm water and swirl it on your cake of artist soap, then work up a lather in your palm using small circles.
Rinse in lukewarm water, never hot, since heat softens the glue inside the ferrule. Lather and rinse again until the suds stay white instead of coming up tinted.
4. Reshape and Dry
Pinch the bristles gently back into their original shape with your fingers. Lay the brush flat on a table or rack with nothing resting against the hairs, and leave it until it is completely dry.
Method 2: The Solvent Clean (Gamsol)
For a faster, deeper clean, odorless mineral spirits are the studio standard. Traditional turpentine is a pine-resin distillate that is more volatile, has a lower flash point, and is more toxic than petroleum-based white spirit, which is why most painters have moved away from it.
Odorless mineral spirits go a step further. Gamsol, for example, has the aromatic solvents refined out of it, leaving less than 0.005 percent, and aromatics are the part of mineral spirits that does the most harm (2). Keep the container closed between dips, work with a window open, and wear gloves if you have sensitive skin.
- Time: 10 minutes
- Difficulty: Beginner
What You’ll Need
- Odorless Mineral Spirits (Gamblin Gamsol is a top choice)
- Two glass jars (ideally one with a coil or mesh screen inside)
- Paper towels
- Master’s Artist Soap
1. Set Up Two Jars
Decant a small amount of solvent into each of two glass jars, and leave the bottle sealed. Jar one is the dirty jar that does the heavy lifting; jar two is the rinse jar that stays relatively clean. Working in two stages uses far less solvent than repeatedly dirtying a single jar.
2. The Solvent Bath
Wipe the loose paint off first, then swirl the brush in jar one. If the jar has a coil, run the bristles gently across it to open them up and release the paint packed near the ferrule. Never press the brush down onto its tip.
3. Wipe, Rinse, Repeat
Lift the brush, tap off the excess, and wipe it firmly on a paper towel. If color is still coming off, go back into jar one. Once the towel stays mostly clean, give the brush a final swirl in jar two.
4. Wash With Soap
Solvents strip the natural oils out of hair, so the soap step is what keeps the bristles from going brittle. Lather the brush with artist soap and lukewarm water, swirling in your palm until the foam comes up white.
5. Dry Flat
Rinse thoroughly, reshape the tip with your fingers, and lay the brush flat to dry.
What to Do With Used Solvent and Oily Rags
This is the step most guides skip, and it is the one that actually matters for your plumbing and your house.
Settle It, Decant It, Reuse It
Do not throw dirty solvent away, and never wash it down a drain, indoors or outdoors. Pour it into a sealed glass jar and leave it alone. Over a few days the pigment sinks and forms a sludge, and the clear solvent above it is perfectly good for the next cleaning session. Decant that clear layer back into your working jar and leave the sludge behind.
When the sludge builds up, it counts as household hazardous waste. Take it to a local hazardous waste drop-off rather than putting it in the bin.
Oily Rags Can Start a Fire
A crumpled pile of oil-soaked rags generates heat as the oil oxidizes, and linseed oil oxidizes fast enough to ignite the pile within hours with no flame or spark involved. Spontaneous combustion and chemical-reaction fires caused an estimated 14,070 fires a year in the United States between 2005 and 2009 (3).
Handle rags like this every single session:
- Never pile them. Lay each rag out flat, or hang it on a line, so heat escapes as the oil cures.
- Dunk them. Once you are done, drop the rags into a covered metal container and saturate them with water.
- Get them out daily. Take the container’s contents out of the studio in a sealed bag at the end of the day.
Alternative Cleaning Options
If you have neither linseed oil nor Gamsol on hand, you can clean your paint brushes with a few household items.
Baby Oil
Baby oil lifts paint the same way a drying oil does, and it is cheap and gentle on natural hair. Follow the same dip, wipe, wash routine. The catch is that baby oil is a non-drying oil, so it never hardens. Wash every trace of it out with soapy water, or it will sit in the bristles and refuse to mix with your next load of paint.
Dish Soap
Dish soap (like Dawn) is a strong degreaser, which makes it a good stand-in for artist soap in the washing phase after oil or solvent. It is not a substitute for that first step, and it is drying on natural hair over time. Work a dab of hair conditioner through the bristles every few washes to keep them soft.
Natural Cleaners
EcoSolve and Murphy’s Oil Soap are low-toxicity options worth keeping around. Murphy’s is the one to reach for on a wooden-handled brush, since it cleans the hair and the handle without stripping either. Dip, swirl, rinse in lukewarm water.
Dedicated Brush Cleaners
Sometimes you need something stronger. The Masters Brush Cleaner is a solid cake of soap that wets, swirls, and rinses in about a minute, and it pulls oil, acrylic, and watercolor stains out of hair that already looks stained for good.
How to Rescue Dried Paint Brushes
We have all done it. A brush gets left on the easel overnight and the next morning it is rock hard. Before you bin it, try the vinegar rescue.
- Pour white vinegar into a saucepan or heat-safe cup.
- Heat the vinegar until it is hot, but stop short of boiling.
- Stand the bristles in the hot vinegar. Keep the liquid level below the ferrule if you can, because heat softens the glue that holds the hairs in place.
- Leave it to soak for 30 to 60 minutes.
- Work the softened paint out with a fingernail or a brush comb, then wash the brush in soapy water straight away.
Vinegar can save a neglected brush, but it will not restore hairs that have already splayed. A brush that comes out limp is now a texture tool, not a detail brush.
How to Dry and Store Brushes
Drying is where most brushes quietly die. The enemy is capillary action: liquid climbs up between the hairs into the ferrule, swells the wooden handle, cracks the finish, and dissolves the glue holding everything together. Follow these rules and a good brush lasts years.
- Wipe the handle. Water swells wood and lifts the lacquer, so dry the handle before you set the brush down.
- Lay it flat. A brush stood upright in a jar to dry drains straight into the ferrule, rusting the metal and rotting the wood.
- Or hang it bristles down. A brush washer with a spring lets gravity pull the moisture away from the ferrule. This is the best option if you have it.
- Give it air. Dry brushes in a ventilated spot. Sealing a damp brush in an airtight container invites mildew.
- Store them tip-up. Once fully dry, stand brushes handle-down in a jar or roll them in a bamboo brush case so nothing bends the tips.
Know Your Bristles
Different hair types want different handling, and using the same routine on all of them is how expensive brushes get ruined.
Natural Bristles (Hog/Horse)
Hog and horse hair have a natural “flag,” or split end, that carries a lot of paint. They tolerate oil well and water poorly, and repeated washing with harsh detergent turns them brittle. Reshape them by hand after every wash.
Sable Brushes
Sable, including Kolinsky, is soft weasel hair and the most expensive thing in most brush rolls. Never jam it into the bottom of a jar and never leave it standing in liquid. Clean it gently and finish with a brush conditioner so it keeps snapping back to a point.
Synthetic Bristles
Nylon and polyester filaments handle water and solvent better than natural hair and cost less to replace. Their weakness is heat and pressure: leave one resting on its tip and the filaments take a permanent curl that no amount of washing removes.
What to Do With Old Paint Brushes
When a brush loses its point or the bristles splay, it isn’t trash, it’s a texture tool.
- Scrubbing: Use stiff, old brushes to scrub thin layers of paint into the canvas for backgrounds.
- Texture: Splayed bristles are perfect for painting grass, fur, or foliage.
- Mixing: Use old brushes to mix paint on your palette so you don’t wear out your good ones.
- Gesso and glue: Keep one battered brush for priming panels and one for medium, and your good brushes never touch either.
