Re: Extra Gas Filler Hole

[Tubs]

I’d put a patch on it.
Use your copper skills getting everything clean first.
I’d make every effort to get the tank sealed with solder
before using a sealer. I found that once I got the knack
soldering was not difficult. If you have a spot that leaks,
checking with air, it probably has some dirt in it. Just
blow the solder out in that area and add just a touch of
flux and try again. I just use propane. Seemed to be hot
enough.

A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.