I watched a vid a couple weeks ago that touched this topic. A fresh ( new ) ball was checked for surface prep and RA factor prior to drilling. After 12 games the finish, in the track area had been reduced from 4000 abralon to  roughly 2000, at the end of 30 games the same area was down to approx 500 - 100 abralon thus the ball begins to set up earlier and earlier as the ball is used. They recommended to keep a ball at factory specs a ball could be slightly re-touched with a 2000 then 4000 pad after every 15-20 games to maintain the factory finish, this was not a heavy resurfacing but a surface prep to maintain the desired finish.