Create a reusable chalkboard writing surface on furniture, walls, and more with Tommy Art Chalkboard Paint. The water-based varnish can be applied to paper, cardboard, wood, and plaster. - Tommy Art DIY System - Black Chalkboard Paint, 140 mlTommy Art Diy Specialty Product, BLACK CHALKBRD 140ML - This varnish works best on porous surfaces. On non-porous surfaces, paint a layer of Acrylic Primer before adding chalkboard paint. Apply two coats 12 hours apart with a paint roller or brush. Let dry 72 hours before writing on the surface with chalk.