On Wed, 05 Jan 2005 23:11:56 -0500, LP wrote:
Thanks to all who replied. Argon it is. I, too, have used propane in
the past with good results but I'm a bit leery of it just because it's
an explosive gas.

Actually, it's a _flammable_ gas. And your shop probably has dozens
of things in it which are more hazardous. Sense of perspective and all
that...