I don't know if I trust myself enough to sand it. I may use a roller and try and roll on silver or white. I may wait and let you be the guinea pig, lol.
I used that same tractor supply paint. I think it is magic brand? I used the cheaper can in gloss black. If you use it, make sure the first coat is completely dry before applying the second. I had to resand my shroud and recoil because the paint looked so bad. Actually, If I had it to do over I would have bought the higher priced stuff in gloss black since it covered so well on the deck.