Most problems with antifreeze seem to come from it being too hot. The lowest setting is the only one to use. The longest I've soaked parts is 8 hours. I get too impatient, so I'm pulling stuff up and checking each piece in the crock pot after a few hours. Does anyone else do this too?

Always do this outside. Keep it animal proof as they love the taste of antifreeze. You won't fall over dead if you catch a few fumes.

Copper cream does work well on engines.