okay, so I'm new to laser engraving, i have a eBay 40 Watt laser and i purchased some cermark so that i could engrave some stuff onto my guns. well i lightly coated the part, turned to full power, and set the speed for 12.50. Wash of the cermark, and the letters and what not are all there, at first i thought it worked, but after i scraped with my nail a couple times, the black lettering came right off???
Could us some help or advice on what i may be doing wrong or if the laser just isn't strong enough? i got the power/speed ratio setting off of cermark website, so thanks in advance for anyones help!!!!