My biggest headache is not rusted bolts and nuts- - - -it's pistons that are frozen into rusty cylinders. I usually give them a good soak for several days or even weeks with KROIL, followed by the application of a rosebud torch. As a last resort, I use a big hole saw in a variable-speed drill motor to cut a plug out of the top of the piston and allow the perimeter to shrink away from the cylinder walls. A few aluminum pistons bring more pocket change at the recycler than several trash bins full of beer and soda cans!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!