This gray, self-hardening modeling clay is prepared in moist form, ready to use for all methods of modeling, including wheel throwing and sculpting. When completely dry, finished pieces are durable but not waterproof. Knead MarblexTM to increase plasticity before modeling. Decorate with showcard colors, enamels or lacquers. Protective gloss finishes, clear lacquer, varnish or shellac can be used.