I went up to playitagain sports and bought about 200 pounds of 10 lbs standard plates for dumbell workouts at home. except they didnt' have them all in the same color, so some are black and some are grey. ( at 39 cents a pound I am not complaining ) I want to clean them up and paint them so they all match. I don't want paint chipping off. What kind of paint should I use? How Many Coats? I was thinking of something black and glossy.