What is used to clean polyurethane off a brush?

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Study for the California Painting and Decorating Contractor (C-33) License Exam. Practice with flashcards and multiple-choice questions, each question includes hints and explanations. Prepare for your exam with ease!

Multiple Choice

What is used to clean polyurethane off a brush?

Explanation:
Polyurethane used on brushes is oil-based, so you need a solvent that can dissolve oil-based coatings. Paint thinner is specifically formulated to break down oil-based finishes like polyurethane, making it the most effective choice for removing the film from brush bristles and letting you rinse the brush clean. Water won’t dissolve the polyurethane, and detergent alone isn’t strong enough to break down the resin. Mineral spirits are a similar oil-based solvent and can work, but paint thinner is the standard option highlighted for this cleanup.

Polyurethane used on brushes is oil-based, so you need a solvent that can dissolve oil-based coatings. Paint thinner is specifically formulated to break down oil-based finishes like polyurethane, making it the most effective choice for removing the film from brush bristles and letting you rinse the brush clean. Water won’t dissolve the polyurethane, and detergent alone isn’t strong enough to break down the resin. Mineral spirits are a similar oil-based solvent and can work, but paint thinner is the standard option highlighted for this cleanup.

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