 And one is a stain stripper. If you have a deck that's been stained before, I would use the Olympic Stain Stripper, which is designed to pull that stain out and at the same time clean and correct your deck for the new finish. Now, if you use the stain stripper, you do not need to use the cleaning product. If the deck's not been stained, then you can use the Olympic Deck Cleaner.