this was so amazing, that I have to share it with everyone. I bought a used boat about 7 weeks ago and it needed cleaning pretty bad, with work and fluke fishing I never had the time. but the last 2 days I compounded and waxed and it looks a lot better, now I just need new coushions. but the amazing part is getting the rust like marks off at the water line. I got some on-off poured it in a plastic bucket, painted it on with a paint brush,let it sit a couple minuets and sprayed off. it really is that simple. I hope this helps someone out.