Cool water on a terry cloth towel every ten hours of play seems to keep the marks (all marks) to a minumum. Wipe from head to foot and scrub as needed. A table spray with Quick Clean, Chalk off or Blue Coral once a month seems to restores the fabric brightness. I also use a Dirt Devil with the rotating brush every few matches.
The one year old 860 on my Gold Crown looks nearly new (except for the holes from a few bad masse shots). I would post a photo but I am not at home right now. I use the table 15 - 20+ hours a week.