Rust-Oleum® Filler Primer features a high-build formula that helps fill minor surface imperfections, scratches, and sanding marks for a smoother finish. Designed for use on metal, wood, and fiberglass surfaces, it improves topcoat adhesion and enhances the final appearance of painted projects. This easy-to-apply primer creates a uniform base for paint and helps prepare surfaces for finishing. It sands easily once dry and promotes professional-looking results. Ideal for automotive restoration, repair work, and general-purpose painting projects.