[Unclenick]

I think it's broadly Composition Rust Preventive. I suppose Corrosion-X Rust Preventive is another candidate.

Bill,

Figure to leave it in for an hour. Should be more than enough time to equilibrate. If that doesn't let you pull it loose, take a Styrofoam box and pick up some dry ice. Set a cloth pad on it (to prevent thermal shock) and set the die on the pad and put the lid on and go away for an hour.