I do the rust electrothingy... that i found on this site... ive got a 55 gallon drum that i made my own hottank from using the lye (caustic soda) (crystal household type drain cleaner) i put 5 one lb cans in about 35 gallons of water, can dunk a whole block or manifolds or a wire basket of parts or bolts. I dont even have to use heat. can leave that overnight and will get incredible amounts of gunk even paint off. Dont "DONT" put aluminum parts in there tho. after i let it soak overnight... use the same barrell for the electroalysis putting the positive clamp to the object, and the negative clamp to the barrell is what i do... ya leave that about 4 hrs or overnight (careful it will bubble bad sorta gases sometimes from the lye) but isnt flamable leave that for awhile depending on how big the part is... and even rusty crusty old exhaust manifolds will come out bright..... same with bolts in a bucket.... have used it several times with several different engines...and believe me a couple of old 235 heads layin ouside in the weather for 20 years are rusty......but it cleaned them up...cleaned em up good enought to tell they were rusted through with pinholes in the head......

What it will say on my Tombstone: "Boy, that guy sure owed alotta people Money"