I used the POR 15 product on a 1968 Chrysler fuel tank some 4 years ago - you can't go buy a new one of those in NZ LOL. I followed the instructions to the letter and it sealed all the pinholes - made it safe to use again and the fuel gauge now also works as the sender unit it as tight as it should be. The tanks has never leaked again - shows no signs of weeping anywhere. I would use the stuff again in a flash - good stuff!
BUT - I did follow the instructions to the letter - didn't miss any steps or shorten any times they recommended. Its a bit slow waiting for some curing yet it WORKS.
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