Yes, you can apply TotalBoat TotalProtect directly to galvanized steel, but for proper adhesion, the metal must be shiny and clean. To prepare the steel surface, sandblast to SSPC-SP 6 Commercial blast or grind the surface until it is bare, shiny metal. Next, remove all sanding or blasting residue (sweep, brush, or vacuum, compressed air). Wipe clean with a clean, lint-free cotton rag dampened with TotalBoat Dewaxer & Surface Prep, and follow with a clean, dry cotton rag. Apply TotalProtect within 1 hour of metal preparation.