Living in the midwest we see our share of rust. Getting a seized bolt that has been rusting for over 25 years is pretty common. Using my new Bolt Buster I was able to break loose this rusty nut and finish the job. If it is rusted it is busted, is what it shows on the box, and they were right!
https://boltbusterinc.com/
Bolt Buster BB2-ACC https://amzn.to/3dRfHEu
Thermal Pad https://boltbusterinc.com/product/bbc-thermal-pad/
Mag600 Flat Iron Heater https://boltbusterinc.com/product/bbc-mag/