These are the base settings I use on my Pro for unmasked JDS, IPI, and Rowmark 1/16th laserable 2-color engraver’s plastic:
Cut: Speed 140 / Power 100
Engrave: Speed 1000 / Power 15 / 270 LPI
cleanup with Zeiss 50% isopropyl Lens Cleaner & a clean microfiber towel, or Novus 1 cleaning spray & Novus Polish Mates