John,

I use that same process when drilling mounting holes through glass, using only water as the coolant. I can't believe I didn't think of it for metal engraving applications. Thanks for opening my closed mind a little bit further.

Harvey,

FWI

Thermark and Cermark are now the same Ferro Corp. just finished the purchase of Thermark. In fact the two companies started as one (Cerdec) and then split and now are back together again.