"Bob Engelhardt" wrote in message
...
On 7/16/2015 6:25 AM, Jim Wilkins wrote:
I take impressions of recesses by jamming them full of Fimo clay
and
heating them to harden it.

How do you heat it? They say in an oven for 30 minutes at 130 °C
(265°F). I'm too impatient for that.


With a propane torch, until the exposed surface is too firm to stick a
wire into.