I am working on my integra's front suspension, but 3 bolts are rust welded. My impact gun managed to get one off, but the others wont budge. I hit them so much that the impact bit got too hot to the touch. Sprayed with penetrating fluid, hit it with a hammer etc.
My only other option is heat, but the problem is, that it's a wheel well and it traps heat, not to mention there is a brake hose which is very close to the area I will be heating.
How can I contain my propane torch heat to this specific bolt without damaging other areas?
The answer to the question in the title is an induction heating device.
But for this particularly issue I would use a combination of an air hammer and penetrating oil. Hammer it to break up the rust, spray it with oil, wait overnight and try to remove. Rinse and repeat until it comes out.