Do any of you have experience with using LazerBlak aluminum material? I think Rowmark makes it. I have some small warning signs that require a yellow and black color scheme, so I purchased some yellow LazerBlak in hopes of turning certain areas of it black. I can’t find the right settings to accomplish this. JDS Industries suggests to use DPI 400, Speed 70%, Power 35% for a 60 watt laser. I have an 80 watt Co2 Trotec Speedy 400.