I've got an 83 xz550 im trying to fix up to sell. It's had a history of the corners of the fuel tank rusting out and leaking. This one had been leaking before i got it and fixed with J/B Weld or some kind of patching stuff. It started weeping fuel a year after i got it, i re-fixed it with jb, worked great for 5 or so years. Got a new bike, parked the vision, go to fix it up last year, put fuel in it and psssssss leaking fuel out two of the corners. JB Weld, stopped leaking, parked it again for a year, and go to put gas in it again after re-patching the spots (looked kinda soft, peeled off easily) and it friggen leaks like a damn garden hose. Ordinarily, i would say just replace the tank, but the issue with this bike is they're pretty rare and theres no way you're going to find a replacement tank, if you do it will also be leaking. The tank is unique to that bike, unique petcock, unique carbs that need that petcock, unique fuel sender, etc etc. I'm looking for a permanent fix of the rusted out corners on this stupid thing. Is it weldable? Should i just knock the rust back until its solid and j/b it again? Should i just part the damn thing out and be done with it?