Sat down to dismantle Puch Magnum and found one small hole (quickly followed by two more!) in the tank where the Magnum seat touches. Seems this is the same place I noted rust on other Magnum tanks. Checked my spare tank, and, sure enough, it had holes there too! BIG ONES! (So much for the simple replacement solution.)
The original tank was Kreemed by previous owner and is in otherwise decent shape. I know a lot of guys swear by JB Weld (I have never used it). I learned it is, in fact, an epoxy. How large a hole can it repair? Should I grind all the rust down first, even though this will likely create more and bigger holes? Can I use regular two part epoxy and some fiberglass surfboard mesh? Would it be better to do this on the outside and THEN use POR15 or some other tank sealer on the inside portion? I know this topic has been discussed, but I am looking for an answer about the BEST way, especially when the larger holes on the second tank are about 1/2-5/8" in diameter. (I would like to experiment on that one first).