Art Advantage - Cradled Painting Board - .75in. Wall - 18x24in. - Art Advantage Painting Boards are made of unique sustainable and renewable paulownia wood. These painting boards can be painted on either side and are ready to hang. They are non-warping, water resistant and prized for their workability. No surface prep is needed, and they are ready to accepts grounds for oils, acrylics, egg tempera, encaustic and other painting media.