Sorry, I meant that maybe you shouldn't rattle THAT tank anymore. It really is an effective method of removing rust from a tank, and helps avoid harsh chemicals if that isn't your thing. Since it only really removes the damaged metal, it won't make the tank worse than it already is... unless it's paper thin.
You more than likely got to that tank just in time
You more than likely got to that tank just in time
Oooooh. Ok I get it now. Yeah when you are shaking the gas tank and you can feel the cold gas through the tank as it sloshes by your hand, it may be too thin to be using that technique. LOL