Someone else chime in since I'm by no means a professional, but I've got a bottle.
It works better by PC (finishing pad, speed 3-4) IMO. I've used it on black only and by hand it's a pain to remove, leaving streaks everywhere. With a PC, you can get it on thin enough that it's not so hard to remove. Looks great under Natty's Blue! It is a glaze only product so no sealants....