How to Clean Oil-Based Paint Brushes | Solvent Steps

Clean oil-based paint brushes with mineral spirits or paint thinner, not soap and water alone, then wash and dry them properly.

Oil-based and alkyd paints won’t budge with water. The reliable way to clean oil-based paint brushes is to break down the paint with a solvent like mineral spirits or paint thinner, then finish with soap and warm water. This guide walks through the exact steps that work, including safety rules and disposal tips that most homeowners miss.

The Solvent Cleaning Method That Works

The working method for oil-based paint brushes is simple: remove excess paint, soak and agitate the bristles in solvent, then repeat until the brush is clean. Sherwin-Williams recommends using two containers — one holding the solvent, the other for depositing the released paint.

Pour solvent into a plastic bowl or small container about 1/8 to 1/4 inch high, then:

• Wipe or scrape excess paint from the brush first.
• Submerge only the bristles, never the ferrule (the metal band).
• Stir or agitate the brush in the solvent for 10 to 30 seconds.
• Press the bristles against the bottom of the container to help release the paint, as Benjamin Moore advises.
• Wipe the bristles against the bowl’s edge, then spin the brush over the second container to deposit the released paint.
• Repeat with fresh solvent until no more paint comes off.

Never dip a dirty brush straight into the original solvent container — you’ll contaminate the whole batch.

Finishing Wash and Drying

Once the solvent has done its work, wash the brush with soap and warm water to remove any remaining solvent and paint residue. Work the soap through the bristles, rinse thoroughly, and shake out the excess water.

Reshape the bristles with your fingers and dry the brush flat or hanging. Drying a brush upright on its bristles will bend and ruin the shape.

Safety Rules and Disposal for Solvents

Mineral spirits and paint thinner are flammable, so work only in a well-ventilated area and keep them well away from open flames or sparks. Wear chemical-resistant gloves and eye protection — these solvents can irritate skin and eyes.

Never pour used mineral spirits down a drain. Sherwin-Williams advises straining out the solids so the solvent can be reused, then letting the settled solids dry away from children, pets, and flames before putting them in the trash.

Common mistakes that ruin brushes include soaking a dirty brush in the original solvent container, trying to clean oil-based paint with water alone, working without ventilation, and leaving solvent-soaked rags near a heat source.

If you’re working on wood surfaces and want a brush that holds up to repeated cleaning, our tested roundup of the best brushes for oil-based paint on wood covers the options that last.

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