gel coat will keep the water from working it's way into the fiberglass,
A polyester gelcoat will provide no additional protection from blistering than the polyester resin used to lay up the hull. An epoxy barrier coat does provide some protection.
coat of clear ex poly [epoxy]
This is better than polyester but would make application of the bottom paint harder. Epoxy dries hard and slick. The amount if sanding required would be extensive including removal of the blush (depending on epoxy used). Barrier coats like Interlux 2000e or Pettit Protect have additives making them work better than 'just epoxy' and have an application window where no sanding required between coats and applying the antifouling. :: Dave Scobie :: M6'8" #650 :: SV SWALLOW - sv-swallow.com :: former owner M17 #375 SWEET PEA - m17-375.com :: former owner M15 #288 SCRED - www.freewebs.com/m15-named-scred/ On Thu, Apr 25, 2019, 6:52 AM carlos navarro <chisailor1@gmail.com> wrote:
Gerry, a coat of clear ex poly or gel coat will keep the water from working it's way into the fiberglass, make sure you wipe the area with acetone. have fun only.
On Thu, Apr 25, 2019 at 5:11 AM Gerry Lempicki via montgomery_boats < montgomery_boats@mailman.xmission.com> wrote:
To add gelcoat or not? Here's the deal; we stripped all the paint below the water line since we didn't know what it was, and it needed refreshing. I also removed a through hull, and redid a couple old through hull patches I found because I didn't like the looks of them. As we removed paint we found many areas (particularly under the lapstrake edges) where the gelcoat had been previously been sanded through. And of course I have the new repairs I did. Should all this have gelcoat reapplied over the fiberglass? I will be using Interlux 2000e primer, and maybe Bottomkote NT over it (not sure on that yet). The boat will be moored in fresh water for 5-6 months. Any thoughts on what should be done for proper protection/longevity of hull?