Rattle cans should be ok, just watch your spray pattern so you don't get "zebra striping" in the finish. You'll want to at least scuff the existing finish to give the new paint something to adhere to. You won't have to use anything too coarse, 320-600 grit should do it. Make sure to wipe it down before you paint to keep the dust and other nasties from messing uo your finish.


Bill Burmeister