"Robin S." wrote in message
...

"Proctologically Violated©®" wrote in message
...

I've heard of machinists/heat treaters who have "catalogued" hundreds of
alloys merely by the spart test on a grinding wheel--keep a box w/
reference samples. wow...

Grind a small surface, and lick it.

All right, what's the punch line?

--
Ed Huntress