Looking for truck undercoating near Bowmanville? Ultimate Detail & Rust Check offers the Rust Check Coat & Protect oil-based undercoat as a standalone service starting at $100, or included free as part of a full Rust Check application. This is a thick, vaseline-type oil that stays flexible and never dries, hardens, or cracks, unlike rubberized undercoatings that can trap moisture and make corrosion worse.