Choose an acrylic enamel with the application and performance characteristics of an alkyd enamel. Mirrolac-WB Interior/Exterior Acrylic Enamel bonds to hard, glossy surfaces such as aged oil base or alkyd enamel without sanding. This waterborne acrylic enamel also provides superior flow and leveling as well as hardness and durability. This all-purpose, non-yellowing acrylic enamel is ideal for walls, equipment, machinery, piping, structural steel, storage tanks, wood or metal trim, shutters, building exteriors, prefinished siding and metal fences.