Just wet the brush and work up a lather on the hard cake. Even old, hardened oil paint brushes can be restored to their original snap and luster.
Brush Cleaner and Preserver works on most acrylics and watercolors, too. It gives off no harmful fumes or odors.
The General Pencil Company was founded in 1889 and has been making arts supplies in New Jersey ever since. They’re especially known for a recipe invented in the late 1970’s to clean, preserve and restore brushes. The Masters brush cleaner works with watercolor, oil, acrylic, stains and varnishes. It conditions the brush to hold more color and preserves the original shape of the hairs to maintain line quality.