Thanks for the discussion, guys. I don't have ready access to dry ice, but I work a lot with Liquid Nitrogen and Liquid Helium, so if I wanted, I could use the LN2 to cool things down quite rapidly. The thought that runs through my head there is that the LN2 will inevitably get on the steering wheel hub and that cold, combined with a 60 year old plastic, the plastic could just split right before my eyes and ruin it before I start. But don't think the thought hasn't crossed my mind. I think I'll try the heat and cool and heat and wax method first and see what happens.