You are dead right, Bret. When you have it handy and the part can survive the heat.
Used to take broken off exhaust studs out of air cooled VW aluminum heads. You will
NEVER get it out without heat, but get the stud stub up to red hot, and get ANY kind of
handle on the last bit of it, and you will unscrew it, threads in the aluminum will be fine.
I probable did at least 6 or 8 that way. The good news was that they almost never broke
off completely flush, always just a bit of a stub. File the sides flat and grab with a vise grip
after heating.....out it comes.
But ATF/acetone or even ATF/ mineral spirits works GREAT on rusty steel bolts and steel nuts. Have
not yet tried it on dissimilar metals. Have been soaking a Gehendra screws for a couple of months,
and trying Oil of Wintergreen, too. So far, no luck but the darned problem is the locking screw
on the main screw (like some 98 Mauser action screws, sorta) is a very shallow flat bladed screwdriver.
I may try my tiny airline oxyacetylene torch on it. Tha cation moves and the hammer falls, but it is
a ball of non-pitting, uniform rust. Seems salvagable if I can get it apart to really clean it up properly.
Al - a friend's daughter is going to San Bernardino, a grad school to study oceanography. What school
would that be? What's it like around it, safety wise?
Bill