DIY projects

I really like talking about this project but I'm going to do my best to keep this simple along the way. After failing to find the product I wanted last night and spending about an hour reading on my iphone I was able to find sealants and epoxy that will work. So I'm hoping to save the next guy some reading time.

Wood is cut. Need to coat it in something to waterproof it that’s reef safe.
First product I got is Bondo all-purpose fiberglass resin

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I've always loved mixed materials in buildings and designs. The last home my family built had dark, charcoal grey polished concrete floors. My room had light green walls and rich wood furniture. It was actually very calming. Since then I've played around with a few ideas. I built a concrete fish tank that functioned fine but didn’t come out perfect and I never had a second go at it since it was pretty hard to make. But let’s bring it forward to today. Plywood tanks. I've read up on all the ones ...