Reply to "stubborn lower-rear control arm bolt"

Tajon, get down and look closely at the bolt while someone is spinning it. There's a steel sleeve inside the bushings, and the bolt may be rusted to it so the whole thing is spinning. If so you won't be able to retract the bolt. This is a problem with the long lower pivot stud on the rear upright(internal rust) and there, the 'fix' is to cut the thing apart. And you do live in an area where there's rust problems....

While penetrating oil, big hammers and the like might eventually work, it may come down to somehow cutting the ends off the bolt, removing the parts from the car and working with them on the bench. New gr-5-equivalent metric bolts are not at all expensive and might be easier than beating yourself up trying to reclaim a possibly already-damaged bolt.