Depends on if you're just spraying over the original paint or sanding down to plastic. I sanded the bumper down and sprayed it with some generic primer and then three coats of color (about 2 1/2 cans worth) and two coats of clear (about 1 1/2 cans). I could have probably done it with 2 and 1 but I had ordered enough to paint the fender and touch up some other stuff.