I powdercoat my own cups and i also etch stock powdered cups from ozark and other manufacturers. I do 40% power, 500mms, and a quality of .07 (in rdworks not sure what dpi that is) on a 100watt co2 laser. I do two passes and finish with magic eraser, 91% alcohol, and then a microfiber towel. My candy colors are etched in one pass and some colors like boron blue need a heavy scrubbing after the second pass.