Had an Idea and I wanted to run it by some of you to see what you all thought. We all know how expensive custom tanks are, So I am wondering just how waterproof is fiberglass. I am pretty handy with glass so I was thinking about making some custom tanks for our boat. They wil not be huge and more than likey will not ever bear any load other than the water pressure. Just wondering if this would work and whether or not the glass would need a coat of something to make it absolutely waterproof.
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