We sand and buff all the cars we paint to eliminate any nibs or excessive orange peel. I hesitate to sand a factory paint job, as they are pretty easy to buff through the clear coat. Just a good buffing with a foam pad and some medium grit compound followed up with a grey foam pad and glaze will help it a lot. Black is , of course the worst color to work with to get it really nice. But it is the prettiest when done right.
