OK, my $.02, - - On & Off for deck stains, but BarKeepers friend for rust stains around cleats…make the putty, let sit, scrub it off. Don’t get into the gelcoat. I have not been satisfied with most other boat store cleaners; they will keep a newer boat looking good, but if you got some real stains, On&Off and Barkeep’s.
“Fair skies, tight lines, and green numbers.”