Hammerite Smooth Spray Silver (400ml) dries quickly to provide metal with a smooth finish and a beautiful high sheen. The metal paint’s special 3 in 1 formulation performs as a primer, undercoat, and a topcoat for ease of use and convenience. Hammerite Spray can be applied directly onto rust, and provides up to 8 years of durable, corrosion resistant and weatherproof protection.