Rustins quick dry red oxide primer can be used on all bare metal surfaces interior and exterior it is formulated with acrylic and special anti corrosive pigments to prevent corrosion apply using a quality brush one coat is normally sufficient but second coat may be applied if required the surface may be cleaned with a mild detergent solution or white spirit as necessary must be over painted with an undercoat before applying a top coat stir well before use dry time approx 30 minutes depending on