Because the section of the boat above the rubrail had many areas of spider cracking, I just removed all the gelcoat from that part of the boat. In some spots the spider cracking continued into the fiberglass so I removed that as well, and then put new fiberglass over the entire area. I used polyester laminating resin to do all gelcoat repair, which required painting with gelcoat so it would cure. Then sanding off the gelcoat so a final layer of Totalboat epoxy fairing can be applied and sanded down smooth in prepartion for the Alexseal primer coat.