Corrosion-proof coatings are multipurpose topcoats formulated from hydroxyl resins, weather-resistant pigments, and hardeners, suitable for outdoor environments, providing excellent decoration and protective effects on metal surfaces. Polyurethane paint is a two-component coating, consisting of base paint and hardener, with superior mechanical properties of the film, good adhesion, and compatibility with various primers. The coating has a full sheen and can be adjusted to glossy, matte, satin, and flat finishes.