FolkArt Finishes - Artists Varnish - Gloss. Cover your project with the Gloss FolkArt Finishes - Artists Varnish to seal and protect. This polyurethane sealer is non-yellowing and dries clear for a radiant, glossy finish. Brush on in thin layers for easy control. Add this premium varnish to your collection as a finish to all your crafts. The hard work of your projects will be preserved from wear and tear with this durable varnish.