After having great luck with soaking gunky razors bought on ebay in an Oxiclean solution, I put my newest acquisitions into an Oxiclean bath and went out for a bite to eat. When I got back everything looked nice and clean and soap scum free except for the two aluminum handled Techs. The handles on both of these have turned completely black, I'm guessing that the Oxi just oxidized them. Is there anything I can soak them in to get them back to a nice silvery aluminum shine or is this gonna take a lot of hard rubbing and polishing to restore the finish?