Non-sanding primer sealers are designed for maximum adhesion and rust inhibiting qualities when applied over steel, aluminum, fiberglass and properly sanded surfaces. Additionally, these undercoats are designed for color holdout and have excellent filling qualities. Super Rust Stop Primers can be coated with lacquer, synthetic enamel, acrylic enamel or polyurethane. To apply, reduce from 25 to 50 percent with an Acrylic Enamel reducer. Super Rust Stop Primer should then be sprayed at 40 to 50 PSI in one medium coat.