Hi Mark,
yeah, those bars just gotta go!
And DO NOT put air pressure in your tank. Firstly, it's bloody dangerous and secondly, because of their ridges and tight curves plus
the work-hardening caused in their formation those dents have become the strongest part of the tank.
OK you can use pressurized liquid so you don't make an air-bomb but internal pressure will spread the tank tunnel so much that the tank won't be usable long before those dents move at all.
I'd say you have to sacrifice the paint job, scuff the dents down to bare metal, torch-anneal the dents to dull red, polish the deepest parts of each dent
bright and shiny, low-temperature-braze 1/4" flat head screws on the dents and take a slide-hammer to them to pull out the worst of the dents.
they won't be perfect but they'll be good enough to fill with bondo after you've unbrazed the studs.