Simply wet the brush and work up a good lather on the hard cake. The Masters Brush Cleaner and Preserver help restore those old oil and acrylic and watercolour brushes. Removes wet and dry oil paint, watercolour, acrylics, stains, alkyds, gouache, latex and enamel paints.?Specially formulated for synthetic and natural artist, craft and decorative paint brushes. Cleans and conditions. Leave lather on brush to shape and condition bristles.