Can RustSeal be applied over another coating?
Yes, you can apply RustSeal over another coating as long as the existing coating is fully cured.

If the surface is glossy, it should be lightly scuffed with 320-grit sandpaper and thoroughly cleaned with KBS Klean. This preparation helps ensure long-lasting adhesion.

If the existing coating is not well adhered, use a wire wheel to remove all loose or failing areas before surface preparation.
Is it better to apply RustSeal directly to bare metal?
Applying RustSeal directly to a properly prepped surface provides the strongest and most durable foundation possible.
Tip: Just like building a house, the foundation of your coating system is critically important. RustSeal delivers the best long-term protection when applied directly to the prepared substrate.

However, when bare metal application is not possible, applying RustSeal over an existing, properly prepared coating is still an excellent option.
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