Rust-Oleum Automotive 254862 32-Ounce Black Sandable Primer Quart, Black Rust-Oleum Sandable Primer provides a tough, rust-inhibitive base for most brands of automotive lacquers and enamels Sands smooth for the ultimate finish All Purpose, Stops Rust formula Wet and Dry Sandable Strain Sandable Primer with a fine screen before pouring it into the spraygun cup