The Ceramic colours are ideal on terracotta and earthenware. To maximize the brightness on porous surfaces it is recommended to apply, prior to painting, a filler undercoat. On rounded surfaces, be careful not to overload to avoid runs. Ceramic colours can be applied with brush, sponge, screen or bath. A sufficiently thick layer of colour can be combined with other materials like sand or engraved with a stick. Objects decorated with Ceramic colours are for decorative use only. Always clean brushes thoroughly with white spirit or odourless mineral spirit, then rinse with soapy water.