Hey there. After quite an experience getting ripped off by a fraudulent seller in the States, I actually have a laser engraving machine coming my way from China (Yes, a Chinese laser, but it's purely a hobby machine that will likely run 5-6 hours a week, if that, so I figure I don't want to go high end ). I'll basically just be doing dog tags and paintball guns. I came across this video on youtube of an iphone being etched and they used a masking material to check the alignment of the image before burning the anno. As I'm starting out (and likely after), I'm going to want to do that. The only problem is that I can't seem to find what this material is and where to get it. Are they just using some sort of sticky paper and turning the juice WAY down, or is it a specialty product? Any help would be much appreciated.