Worked on these yesterday at work and was amazed the detail that appeared after wiping the piece down with a Lysol wipe! Keep some handy for sure if you are etching powder coat. Also, every powder is really different, most powder coat I have been using takes a 30% speed and 60% power while this took two passes at 20% speed and 100% power to get through the powder. Give yourself some test pieces to play with settings on!
Now only if I were doing this on my GF, hopefully soon!