Personally, I would always advise against any type of coin cleaning. A cleaned coin will have lost most, if not all, of any numismatic premium value. I know from my days when I used to be an avid coin collector, that almost without exception, collectors will avoid cleaned, whizzed, dipped, any sort of cleaned or treated coin. To me, it's roughly the numismatic equivalent of a pressed note.
However, of course, if a collection is simply for the beauty of it, as opposed to accumulating numismatic value, clean away!
