I don't have a fibermark or a yag laser, it's only a 40w. I have engraved on my leatherman but with poor results because of the frequency and power of the laser. I'll try engraving on a lower and see what happens. I'd rather ruin my own stuff than somebody elses. I DID do a shotgun bolt with a date and initials..... a true "shotgun wedding" I guess. HOWEVER, pregnant pause.... I had to use a special chemical to cause a high power exothermic reaction on the metal. I'm saving my pennies for a larger more powerful laser with the rotary device (and a waterjet in my dreams!!) but I'm not there yet. I am going to put the old bill engraving on my Henry lever action rifle though. I'll post some pics.
Best,
Brian
Best,
Brian