I need some help to outsmart my dad. We have a piece of equipment which the base metal is aluminum and a chromed metal rod is rusted in a hole. How can I reverse this. I have tried using brute force to no avail with pipe wrench, a hammer and commercially available rust penetrants. Is there a chemical I could use or even electricity to loosen this metal rod? I have also thought about heat but afraid to crack the aluminum case which is about 1/2" thick.
Thanks
Rebus