Fiberglass repair question...
The day before yesterday in Bakersfield I pulled our 5er into a horizontal sign arm while turning and punched a hole through the fiberglass exterior and pushed out a section of wallboard inside. One ...
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I have a good bit of experience with fiberglass. For a hole as big as you describe. You are going to need something had behind it. You can't lay glass in air.
First you will need to soften the sharp edges around the hole so that it does not frame it. Sand on a angle. I would suggest removing the inside wall board inside. Then cut a 1/8" piece of plywood a little larger than the hole, and affixing it to the back / inside of the hole. Might could get it to stay there with resin. After than sets up. then lay, and roll out a layer of Woven roven on the board. For strength. Let it get tacky, Paint resin on it, and lay the thin cloth fiberglass on that until it comes our even with the outside wall. Then sand it smooth, and I mean smooth. You will need to finish the sanding with no less than 400 grit water paper. After all that. You can get gel coat to match. Spray it on, Pretty thick feathering it out from the patch. Wait for it to dry, and then sand it smooth. Again you may want to do the final sanding with 600 grit water paper. Then buff it out, wax it and you are done.
First you will need to soften the sharp edges around the hole so that it does not frame it. Sand on a angle. I would suggest removing the inside wall board inside. Then cut a 1/8" piece of plywood a little larger than the hole, and affixing it to the back / inside of the hole. Might could get it to stay there with resin. After than sets up. then lay, and roll out a layer of Woven roven on the board. For strength. Let it get tacky, Paint resin on it, and lay the thin cloth fiberglass on that until it comes our even with the outside wall. Then sand it smooth, and I mean smooth. You will need to finish the sanding with no less than 400 grit water paper. After all that. You can get gel coat to match. Spray it on, Pretty thick feathering it out from the patch. Wait for it to dry, and then sand it smooth. Again you may want to do the final sanding with 600 grit water paper. Then buff it out, wax it and you are done.
