The cleaning power of pressure washers can also extends to the pre-treatment of metal surfaces, with the right equipment. There are certain pressure washer models that are suited for phosphatizing metal surfaces; this is a process of treating the metal to prevent things like rust and corrosive build-up. This process is also used to treat the metal so that paints and primers can readily adhere to the surface. The Super Max® 15400 AF from Daimer®...