Just started Compound Polishing. What are these black spots?
I bought a Makita polisher with a wool bonnet. 600-3000 RPM's. I've been running at 1500-2100. I have the Nuvite polishes G-7, C and S. Started with G-7. I am getting a mirror finish that I am thrilled with, BUT I am getting these black smudge marks. I can wipe them off somewhat. Am I going to fast, or too much or little polish. I still haven't fully removed the white etchings. On the 3rd pass with the G-7 they are almost gone. Is that what I need to do? Or do I need to get the cut heavier than G-7. Or do I need to go down to the C and then the S. I am finding that I need a fair amount of polish to remove the etchings. The black smudges don't seem to be related to the amounts of polish, but maybe I'm wrong.