Early Parker 12ga hammer Disassembly HELP!

[charlie cleveland]

I had a stuck trigger guard on a 1894 Remington double barrel I soaked it for a week with kroll oil then wd -40 no luck...put the hot wrench to it and poured water on it till cool and it screwed right off...some times it takes heat and cooled with water the steam makes the rust break lose....my job you to consist of takeing out car exhaust manifold studs out for the muffler shops..a torch a water hose and a pair of vise grips got most of them some times I had to weld a nut to them also then do the heat thing and the threads will still be good...I ve had to do this as much as 4 times on a really stubborn bolt..this is the best method I know of for anythink that's stuck with rust....charlie