I've got numerous old (and not so old) amps that have rust issues: on the fasteners of amp handles, on the little panels on either side of the top of Fender amps, etc. Anyone know any methods to remove the offending stuff short of having the piece re-chromed? I'd also love to be able to clean a control panel with silk-screened printing. I figure there's probably no way to do this without obliterating the writing, but maybe I'm wrong.....? Thanks for any suggestions.