I have a Monport 80 watt laser. I am trying to engrave on white, golf ball dimple leatherette. I am struggling to find the correct settings even after running a test grid. The issue I am having is, after engraving, I clean the hat patch off and some of the black rubs off. I am told I need to engrave deeper, but how much more do I need to bump the power up? I am running 307mm/sec and 22.5 power. I am at a complete loss of where to turn to next. Any and all help is very much appreciated!