A sad irony, I can't get aluminum to mark good with my 30 and 40 watt metal Synrads, but the 80w glass RECI really fuses the Cermark down.

And, my EnduraMark came today. But I'm going to do exactly what it says, which is fill the bottle to the arrow with DNA and clean up the airbrush and spray the stuff... I'm actually hopeful it'll actually go black...