I've been doing sanding and buffing for a long time now,after you clear it,let it dry.Wet sand it with a 1200-1500 grit then a 3000 grit.Then it must be compounded out,that's the only thing that will get the sand scratches out.After compounding it with the white 3M waffle pad,then you will have to glaze it like Tampamax said with a 3M blackfoam pad and a good glaze.I recomend all 3M products,there exspensive but well worth it.After you glaze it you'll want to put a real good coat of wax on it to seal it.Any further questions I'll be glad to help on the sanding and buffing part.