Here is a picture of my results (after etching) and a video of the process.
I used rubbing alcohol to remove the paint that re-deposited back onto the surface of the copper. This actually seems to be quite a problem. If I do not use the proper speed and power settings (perhaps 20 speed and 60 power?), then I get bad results due to the paint I am not trying to ablate burning, or the paint that I am ablating sticking back to the the surface of the copper.
