Clean the parts with something like Simple green, then paint them with this using small foam brush and a small art brush. Make sure and keep it stirred when using, it has aluminum shavings suspended in a binding agent. You can paint all of your aluminum parts with it. Guaranteed results every time. In a year it will still look this good, it two years, three years, etc. I then masked off the letters and used an electric sander and brought the letters back to a brushed aluminum look.