Ha Fish On
Unfortunately you are NOT Right On in your thinking. I entertained that same thought but the nature of corrosion in aluminum does NOT make it go away it keeps eating it’s way and will cause a blister in your glass layer. Kind of like putting a bandied on a cancer might look ok at first but the corrosion Will push through the layer of epoxy and glass and will break through. Plus the corrosion will go downward and eventually cause gas to come through to the epoxy then there is the relationship of epoxy and gas as well. They do make fiberglass tanks from scratch (no aluminum) but the resin is different. I don’t think (I could be wrong) epoxy and gas are compatible you would have to check that point out. Bottom line is this no one will want to go back in and Fix it 2 years later. My suggestion it to belly up to the bar with your $$$ and get a new tank.
FellowShip
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My motto: Just for the Grins