[LuvDaBlues]

John, note: My expansion tank is chrome.

FWD: I worked until my fingers bled while scrubbing with the other stuff. About three weeks of trial and error. Turns out the cosmoline actually stained the cast aluminum.

The Metal Wax fluoride has specific instructions on use. Heavy rubber gloves, face mask, eye protection and lot's of ventilation. Really nasty stuff. But worked beautifully. I didn't catch a couple of drips down the side of the aluminum block, and it did leave some darkened streaks. But they are covered mostly by the engine mounts.