Advanced Protective Products Rust Destroyer Corrosion Prevention Primer, 1/2-Pint Rust destroyer primer is only solvent-based non-toxic, patented, USDA-approved, FDA-approved universal base rust converting paint primer Rust destroyer primer will work on clean steel, rusty steel, zinc galvanized metal Rust destroyer is a self etching primer that "bites" into the previously painted surface No special surface treatment needed Available in 1/2-pint container