I have a set of rims with really rusted out chrome(pitting and flaking). The chrome is not salvageable as I can remove much of it with my fingernail. I've been trying to grind it off with my wire wheel to no avail. The bad spots come off easy but some of it is really stubborn. Small patches here and there that flake the tiniest bit around the edges but still remain. What can I do? I would like to paint them.