What is the appropriate cleaning agent for a paint brush used with shellac?

• A. Turpentine
• B. Water
• C. Alcohol
• D. Mineral spirits

Answer: (C)

The appropriate cleaning agent for a paint brush used with shellac is alcohol. Shellac is a solvent-based finish that is primarily dissolved in alcohol, which makes it the most effective cleaner for brushes coated with this medium. When using alcohol, it allows for the removal of shellac without damaging the brush bristles, preserving their shape and integrity for future use.

Using other substances like turpentine or mineral spirits is ineffective because these solvents are generally suitable for cleaning oil-based paints and varnishes, not shellac. Water is also not appropriate since shellac is not water-soluble, meaning that using it could leave the brush contaminated and compromised for future applications. Therefore, alcohol stands out as the best choice for cleaning brushes used with shellac due to its compatibility and effectiveness in dissolving shellac residues.