I find black/dark to be the easiest to shoot and keep track of your wet line. OTOH, I have my 10,000 hour chip in cut and buff/polishing. Oddly, I still love it. I can say, I bought the Bauer DA at HFT, and it is a reveleation. Takes 2000 grit hand scratch out no problem, wow! Here ya go-
https://www.harborfreight.com/20mm-l...her-56367.html