 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 prep 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. Spray it on. I think it sits on for about five to ten minutes, and then you rinse it off.