Did I get your attention? Dramatic title eh!
My tanks are clean - no gas. Flush lots of water and dish soap many cycles for clean and dry before you do this for "no gasoline vapor" before you attempt this. Insert massive legal disclaimer "here".
I dropped one of my tanks accidently and put a nice dent in it. You can weld on the pull tabs to pull dents w/a slide hammer. Or... a quickie at home is to take a quarter inch steel rod and reform the end into a mushroom head.
Then bend the rod to make contact with dent inside tank. Mount rod in vice and whack lower portion with a large bar of steel or something. The recoil of the pick will hammer out dent or hole from the inside as you free hold the tank with one hand.
You can eyeball placement and then feel for it with tapping. This whole set-up is sort of a poor mans bullseye pick. I find it good because you can really pin point an awkward small area, custom bend rod to fit. Chuck it in the scrap heap when done, with no worries and very little out of pocket.
Dent came right up after a few minutes of whacking. No problem.
SO there! Put that in your pipe and smoke it.
Anyone else have some good tips, or something to add to this? Is this even worth sending it to Steve? It's kinda an old trick.