Yes, TotalBoat Outdrive AF Prop and Outdrive Antifouling Paint can be applied to a powder-coated metal surface. Sand the surface with 80-grit sandpaper to scuff it up, then clean with TotalBoat Dewaxer & Surface Prep, TotalBoat Brushing Thinner 100, or TotalBoat Spray Thinner 101 before applying the paint.