Ok, they're clean now so what do I waterproof them with?
When I bought "Oh Joy", she came with a full set of covers and boom tents. They were horribly stained and mildewed. Having just bought a new LG washer and dryer, I washed them. The difference is startling. They look brand new, no mold, mildew, rust or oil stains. However, what do I spray them with to help them regain their water resistance?