I had just de-oiled (5 hrs) and resurfaced back to OOB my teammate's neglected Virtual Gravity. He was impressed with how well it reacted again, except for complaining about the belt marks it now seemed to get. Well, he shows up last night and struggled badly, with little ball movement, and his ball looked like a shiny marble. After talking with him, turns out that he had decided to use lacquer thinner on it to clean it last week, and I'm guessing that it probably dissolved the surface enough to smooth the surface out. So now I'm redoing it again. Hope he learned a lesson, and hopefully it didn't do any permanent damage to the coverstock.