This easy to use aerosol etches and primes bare, rustfree metal in one step. Adheres to steel, aluminum, stainless steel, and galvanized steel and is compatable with virtually any paint or auto finish. This self-etching formula bonds better to bare metals than other aerosol primers. It is also a single- stage formula which requires no catalyst, making it even easier to use. Buy 3 or more and SAVE! Self Etch Primer is now available in Black aerosol (16114Z).