RE: fiberglass decks??
You can of course do whatever you like with your boat. You did ask for some input and that is what you received. Your decks will flex and the holes will open up if you have a Marine Trader, Albin 43 or a Nordhaven 70. You can jump up and down and see and feel no flexing but it does, different resins react differently to temperature, moisture and you can not exactly match the existing resins and the holes will absolutely open up in time. How do I know this with such certainty? Through 40 years in the marine service industry doing hundreds of fiberglass repairs and more deck repairs than I would like to think about. I have never seen a hole filled in with only resins, it does not matter what kind, that did not open up again in time. I have never seen a hole with some form of cloth or mat over it, open up. So everyone can be an expert and argue over whether it is necessary or not. The truth is it is not necessary, UNLESS you don't ever have to deal with it again. But as individual boat owners we all make the final decisions as to the extent of any repairs or renovations we do and either live happily with the results or deal with the consequences. Chuck