Hi Gerry, Hmmm, I do have another suggestion. Once the tank is all welded together, you can cut the exact same pieces out of brass, a heavy gage, pre-polished, and then, use a two part hardener designed for metal and brass. You, then, come back on the edges with small angle pieces using the same application. Something to think about. There's no stress level, so the new apoxies would work forever. How I know is I've done it. The downside--- you cover up all your beautiful work. Just a thought.