I did my boat last year with Interlux Micron Extra and it seems to be holding up great. My boat is a 27 ft Sportcraft and the old paint was in bad shape flaking off and gone in a lot of places. All I did was scuff it up with 3M sanding blocks and made sure there wasnt any loose parts left. I then wiped it down with thinner and rolled the new paint on. Make sure you get a respirator and a disposable suit because sanding is messy a the paint stinks bad. Some other things I needed box of rags, roller and brushes, tape, thinner, and a well ventilated area. My paint still looks new even after being in the water all last year.