The mbm magazine done an artical about this exact question a few months back not sure what one thought, but im sure someone will be able to say when it was so you could buy the back issue. They used a 3m kit with a professional polisher and brought a blue bayliner back to looking like new. I wouldnt advise using the sandpaper in my opinion.

Best of luck to the season up on Loch Lomond.

hope this was of some help to you