hi, inherited some old but good audio equipment, marantz and nakamichi and B&O....standard metal outside but it has been in a damp closet for awhile and has some staining on the outside....is there a simple cleaning fluid or spray i can buy somewhere that works best to bring out a little of its luster....all the equipment pieces are standard black...the TT has a plastic case (B&O) ...any help to make the old stuff look a little more dignified would be appreciated before i go and use the wrong thing........thanks everyone....