RustOleum Universal Spray Copper Hammered 12OzRust oleum Universal spray is an oil based formula that prevents rusting, resist fading chipping along with an excellent copper finish making it long lasting. Hammered finish hides uneven and imperfect surfaces giving it a great look. It has a fast drying formula which dries in almost 30 minutes. The spray paint provides fashionable and deep, rich copper hammered look to your interiors and exteriors and covers 15 sq. ft. easily per can.