Krylon Rust Tough with Anti-Rust Technology provides premium protection from corrosion and rust on metal, chemical resistance, fade resistance and can be applied directly to metal surfaces. For increased protection and hide when making drastic color changes, use Krylon Rust Tough Primer as basecoat under paints. Best results when air and surface temperatures are between 55 F (12 C) - 75 F (24 C) and humidity is below 60%. Applying outside this range may impact finish.