Rust-Oleum® Marine Coatings Wood & Fiberglass Primer is a fast-drying, easy-to-sand base coat designed for use on aged, cracked, pitted, or previously painted wood and fiberglass surfaces. Ideal for priming surfaces above the waterline, it promotes maximum adhesion and provides a smooth foundation for Rust-Oleum Marine Coatings Topside Paint. This primer ensures uniform gloss and long-lasting durability.