Protect your car from Ontario road salt with professional Rust Check treatment at Ultimate Detail & Rust Check in Bowmanville. As a licensed Rust Check dealer since 2009, we apply the two-step, 100% oil-based corrosion protection system that has been trusted by Canadian drivers for over 40 years. Our Rust Check application includes the thick oil-based Coat & Protect undercoat at no extra charge. We never use rubberized products.