It can protect aluminum alloys from erosion by wind, sand, and rain during high-speed flight, as well as from corrosion by seawater and aviation fuels, and can improve aerodynamic performance. The coating shall withstand transient temperature changes of around 200 ° C and strong sunlight irradiation. Due to the large volume of aircraft and limited baking conditions, it is necessary to select self drying curing coatings, such as acrylic or polyurethane coatings.