Does anyone know here about popping a dent out of the gas tank? Specifically on a curve of the tank. I need to get this popped out before I paint it or get a tank without a dent innit. Thanks for you help.

Had a silver dollar sized one, used the HF tool to pop it out.
Wasn't pretty, but better than leaving it in.
Fortunately, the guy I took it to paint made it disappear.

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You can try the harbor freight thing, but while you're holding pressure out, lightly and quickly tap on the high area around the dent. Also, the longer dents will work out better by pulling the shallow end first.
Last in
First out.

If that's not good enough, there's more.
You're ahead with the compound curves the in getting it shaped, but you may need to shrink some of it. It's not terribly difficult, depending on your skill set. And aptitudes.
Leave it mounted.

The local rental outfit rents the stud welders.

If you're Supposed to pry against the tank to lift your dent out, do a mock up, see where you have to put pressure and find stuff to lay on the tank.

I can't fill in the dents because I'm going to get it powder coated. I found a tanks for sale thats in perfect condition for less than 100 bucks so I'm just going to go that rout. If anyone wants a super cheap dented tank let me know!