Hammerite Direct to Rust 2.5L Metal Paint - Smooth SilverHammerite Direct to Rust 2. 5L Metal Paint Smooth Silver Hammerite Direct To Rust Metal Paint can be painted directly onto rusty surfaces and, thanks to its special 3 in 1 formula, there is no need to use a primer or undercoat saving you precious time! Hammerite forms a superior barrier that not only seals out moisture, but also gives long lasting protection, both inside and outside. Touch dry in an hour, Hammerite is corrosion resistant and is