I've tried several similar products and none of them worked. Figured I was probably throwing away more money when I bought this, but I like 3M's other products so I thought I would give it a shot. I planned to have the seats in my 29' Regal re-covered as the mold spots were so bad. This product literally made them look new with very minimal scrubbing with a soft pad. I am blown away with the results. Saved me lots of money. Finally a marine product well worth the price. Thank you 3M.