5 minute Araldite is the go. It sticks better than any of those tank repair kits or epoxy fillers and is totally impervious to 'all' fuels and solvents. Welding is okay but you are always going to have heat wreck the paint and extra weld runs look out of place, with the Araldite you get it exactly where you want it, it's not such an obvious repair. I've repaired more thab a few tanks with the stuff and I can't praise it highly enough
I wish I had of known that one for the last thirty years
Thanks for sharing Doc, straight into the vault that one. Thanks, Mick.