Martha Stewart Crafts Paint Medium Set, PROMO765 (4-Pack) Martha stewart paints work for all surfaces - perfect for saving time and money High performance, premium acrylic craft paint features a patented polymer resin system Uv and weather resistant for indoor and outdoor use Self priming for use on porous and non-porous surfaces It's perfect for all craft and hobby painting techniques, including brush painting and detailing, sponging, stenciling and stamping