A good brush with a fine point is one of the most useful tools in the hobby, and also one of the easiest to ruin. Most brushes don't wear out; they're killed by a few bad habits. The good news is that a simple routine keeps a brush sharp for many months or even years, whatever you paid for it.
Know your brush
A brush has three parts: the bristles (the hair), the ferrule (the metal collar that holds the bristles) and the handle. The belly of the brush, the fattest part of the bristles, holds the paint reservoir. The danger zone is the ferrule. When paint creeps up into it and dries, the bristles are pushed apart from the inside. The result is a splayed tip that won't come to a point.
Habits while you paint
Most brush care happens during a session, not after it:
- Only load the front half of the bristles. Aim to keep paint between the tip and the belly. If you need more paint, use a bigger brush rather than overloading a small one.
- Don't dip brushes into paint pots. Transfer paint to a palette first, using an old brush or the pot lid. Dunking pushes paint straight into the ferrule.
- Rinse often. Acrylics dry fast. Rinse every minute or two, even if you're using the same colour.
- Don't stab the bottom of the water pot. Swirl the brush gently in the water and wipe it against the side. Grinding the tip into the bottom bends the hairs.
- Use two water pots. One for the first rinse, one for clean water. Change both regularly.
- Never leave a brush standing in water. It bends the tip permanently and soaks the glue in the ferrule.
- Use old brushes for rough work. Drybrushing, washes, texture paints, glue and varnish all destroy fine tips. Keep a set of sacrificial brushes for those jobs.
The end-of-session wash
Water alone doesn't remove all the paint from the bristles. A dedicated brush soap or a mild, conditioner-free soap does the job. Here's the routine:
- Rinse the brush in clean, lukewarm water. Hot water can damage the glue and natural hair.
- Wet the soap and gently swirl the brush on it, or work a little into your palm.
- Massage the lather through the bristles from ferrule to tip, using light circular motions. Don't press hard enough to bend the hairs sideways.
- Rinse, then check the lather. If it's coloured, repeat until it comes out clean.
- Gently squeeze out excess water with a soft cloth or paper towel.
- Reshape the tip by rolling it lightly between your fingers.
Many painters leave a thin film of soap on their best brushes once they're clean. As it dries, it holds the point in shape, and you rinse it out before the next session.
Drying and storing
Always dry brushes lying flat or hanging tip-down, never standing upright. When a wet brush stands upright, water and leftover pigment run down into the ferrule. Once dry, store brushes so nothing presses on the bristles. A brush roll, a flat box or the protective cap (only when the brush is completely dry, and gently) all work.
Rescuing a splayed or hooked brush
If your brush has developed a split tip or a hook:
- Deep clean. Work soap into the base of the bristles and leave it for five to ten minutes before rinsing. Repeat two or three times.
- Dried acrylic. A short dip of the bristles only (not the handle) in isopropyl alcohol can loosen stubborn dried paint. Follow immediately with soap and a thorough rinse.
- Reshape and set. Form the point with soap and leave it to dry.
- Hot water trick for synthetics. Synthetic bristles can sometimes be straightened with a brief dip in hot (not boiling) water, then reshaped. Don't try this on natural hair.
If the tip still won't hold, retire the brush to washes, drybrushing or basing duties rather than throwing it away.
Natural versus synthetic
Natural-hair brushes hold more paint and keep a point well, but they don't tolerate neglect, solvents or harsh treatment. Synthetic brushes are cheaper and tougher, which makes them ideal for metallics, washes and anything abrasive. Metallic paints contain tiny flakes that wear bristles quickly, so many painters keep a dedicated metallics brush.
Brushes and solvents
If you use enamels or oil paints, keep a separate set of cheap brushes for them and clean those with the matching solvent before washing with soap. Solvents strip the natural oils from hair, so keep them away from your best acrylic brushes. Our oil washes guide covers this in more detail.
A quick checklist
- Paint only on the front half of the bristles
- Rinse often, gently, in clean water
- Wash with soap at the end of every session
- Reshape, then dry flat or tip-down
- Keep cheap brushes for rough jobs
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