I only used the old crock pot and anti freeze once. Took too long, and I did like the smell! (I've HAD to work on too many cars! LOL!!)
I still use the tin pot, dishwasher gel, and boil it. It takes the paint off, cleans everything like new and is not a hazzard to me. Plus I have not encountered any of the "discoloration" of the engine cases. Takes about 20 minutes to remove the WORST baked on castor and grime, cleans ball bearings, etc., etc..