If you do smaller areas, about 2 x2 and use mineral spirits (not a thinner) with microfiber cloth rags...the black removal becomes very easy. Then use a microfiber with cornstarch...just a little bit....it all comes off and even shows a bit of polished surface. Do not let the black residue "set up" by doing large areas, then going back....or, as I have seen one polisher do, leave it all for a final clean up of the day. What a mess that was.s
"If it can't be reduced, reused, repaired, rebuilt, refurbished, refinished, resold, recycled or composted
then it should be restricted, redesigned or removed from production."