The white top on my '92 LX was so full of black mold spots.This occurs from dampness and getting wet often.I used a very light mix of water and bleach in a spray bottle.Let it sit for a minute then scrubbed a little with a small soft brush.Now you wouldn't even know the top looked so bad.It's as white as brand new.And no black spots leftover.I did look into other products but I thought i'd try this as a last resort before spending any more $$.