Check the listing for details. The Masters Brush Cleaner And Preserver. Condition: New. Listed at 14.95 USD. NEW - UNOPENED PACKAGE. The Masters Brush Cleaner and Preserver is a non-toxic, solid cleaning soap for artist brushes. It removes oils, acrylics, watercolors, stains, and varnishes. It also conditions bristles to help brushes retain their natural snap and luster.