On Wed, 24 Aug 2005 11:34:22 GMT, kony wrote:

Yes, but if the case is metal that shouldn't matter.
Heating and contraction (after cooling) might even help to
free it if it's stuck in a dissimilar metal case. It may
not be necessary to heat the screw though,

That's how I usually free up screws - heat the thing the screw is in.

if the bit with molten solder is inserted in the screw
head, the solder will still cool to the shape of the screw
head even if it doesn't adhere to it... and it was one of
the reasons I suggested silver solder (or something else
other than tin/lead) as it is tougher than std tin/lead.

I have never tried that. It may just work. If so, then you do not need
to heat the screw - just melt a drop of silver solder above the screw
and let it fall into the head of the screw.