If you play them a lot than not long in my experience...that is their one flaw, you can not replicate the finish on a stoned surface without removing the playing surface and tumbling it again in media. I will say I have a lonzo stoned that I have since got after the playing surface using maroon scotch brite that bowguy recommended and strong rubbing alcohol an it has become one of my favorite pots. Plays as good if not better than the stoned surface in my opinion