How to Prepare a New Squirrel Mop Brush Before Your First Painting
NanaA brand-new squirrel mop brush arrives with its point perfectly shaped — but that's the manufacturer's protective sizing, not paint-readiness. Paint with it as-is and the hairs won't release water evenly, and the point won't snap back the way it should. A few minutes of prep fixes all of that. Here's the exact routine I use with every new mop brush before its first painting.
What You'll Need
- Your new squirrel mop brush
- Lukewarm water (never hot)
- A rinse cup or jar
- A lint-free cloth or paper towel
- Mild brush soap or glycerin soap (optional, but recommended)
Step 1: Remove the Protective Sizing
Swirl the brush gently in lukewarm water until the sizing dissolves and the hairs move freely. Never use hot water — it can damage fine squirrel hair. If the sizing is stubborn, let just the tip soak for a minute or two, keeping the ferrule and handle dry.
Step 2: Rinse Thoroughly
Rinse from ferrule to tip under gently running lukewarm water, softly squeezing the hairs until the water runs completely clear. This carries away every last trace of sizing.
Step 3: Condition the Hairs (Optional but Recommended)
While the hairs are damp, work a small amount of mild brush soap through them with your fingers, then rinse clean. Especially worthwhile in dry climates — conditioned hairs hold water more evenly and stay softer for longer.
Step 4: Shape and Dry
Gently reshape the damp brush to a fine point with your fingers. Then lay it flat or hang it tip-down to dry — never store it wet and upright, or water will seep into the ferrule and loosen the hairs over time. Let it dry completely, which usually takes a few hours.
Step 5: Test on Scrap Paper
Load the dry brush with clean water and make a few strokes on scrap paper. Watch how it holds water, how evenly it releases, and whether the point springs back into shape. If it does all three, your brush is ready for its first real painting.
Caring for Your Squirrel Mop Brush Long-Term
- Rinse thoroughly after every painting session.
- Reshape the point after rinsing, every time.
- Store flat or hanging tip-down — never upright while damp.
- Keep it away from harsh solvents and household cleaners.
- When traveling, carry it in a brush roll or protective case so the point doesn't get crushed.
Final Thoughts
A squirrel mop brush is one of the most expressive tools in watercolor — but only when its hairs are prepped to do their job. A few minutes before the first painting, a quick rinse after every session: that's the whole secret to a brush that stays soft, thirsty, and sharp for years.
