The basics Finest grade of pure high gloss clear copolymer. The benefits This water-based varnish can be used as a medium or top coat with Pearl Ex Powdered Pigments. The uses Works great on paper, clay, metal, wood or plastic and cleans up easily with water. The bottom line This varnish enables Pearl Ex users to create their own lustrous metallic paints, glazes and durable finishes on every surface.