Rust-Oleum 249279 Automotive Filler Primer Spray comes in a hi-build formula that allows it to quickly fill in minor imperfections on a variety of surfaces including wood, metal and fiberglass Creates a level surface that encourages better top coat adhesion and appearance, while adding a layer of protection against rust and corrosion Fills in imperfections to create a level surface Improves top coat adhesion and appearance Protects against rust Ideal on wood, metal & fiberglass