Quarter panels, let's cut em off and put new ones on.

I have had nothing but good luck with the harbor freight flange tool.
I have had mine for over 5 years now, it has put alot of 1/4 panels and patch panels over the years.
Either the quality of them hit rock bottom, or maybe you air compressor is saturating the air lines with water.
Moisture is hard on any air tool, I have three water catches on my air line, (hard plumbed in the garage). So I do not have a moisture issue.
Nope. Not a moisture issue. I have a main dryer right off the compressor, then at each outlet(I have the shop plumbed with 6 outlets. Then I have an in-line one I use on the hose itself.

The last harbor freight one I got was bad right out of the boxed & it was seized. The first I had was the best from them. Did the entire top of the panel before stopping.

I’m not against harbor freight tool, have got a couple of their cut off tools and an air ratchet that are close to a decade old, that work just fine.