Has anyone tried the freezer spray that is widely used in the
electronics industry?  It is readily available, convenient to use
and will potentially cool things to -50 degrees Celsius.  Seems
to be safe on all materials.

Probably just another one of my daft ideas.

Jeffrey Borinsky

 [ It might require several cans, though, to get the same chill
 [ as soaking the wheel in a freezer chest.  -- Robbie