An ideal choice of oil-based primer to use under BPS Agri Systems heavy-duty industrial maintenance tractor and implement enamels. Rusty metal should be sanded and spot primed with rusty metal primer. Rusted galvanized should be primed with zinc dust primer. Apply with brush or roller. Thin to ratio 8 fl. oz. VM&P naphtha to 1 gallon primer for spray application. Covers approximately 400 Sq. Ft. per gallon, 100 Sq. Ft. per quart on smooth surfaces. Dries to the touch in 6 to 8 hours. Clean up tools and spatters with mineral spirits.