A light bulb inside the tank really helps to find those pesky pin holes. That sealer kinda works wonders, I've used a few different sealers and they all work pretty well. But remember how thin the metal was when you tried to weld it? Its still paper thin. So you'll need a new tank eventually.
Utterly disgraceful that RU-vid give you a strike. Using tools in a responsible manner is not dangerous it’s part of learning. These people are absolutely daft!
