While I agree that the rule doesn't make sense (sanding during competition) I was thinking it might be due to people not wiping the dust off of the ball completely and then throwing the ball, allowing the dust to stick to the lanes. I don't know what kinda damage we are talking, but you could argue that would change the reaction of the lane.
Aren't you still allowed to use rubbing alchohol DURING an event though? Cuz that could damage the lanes as much as residual dust from a ball, or at least alter it somewhat
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D <~~~~ Used to be terrible wiffing 10 pins. Now through much practice, can wiff any single pin spare at any time.
Darrell Guzman
guzmand19 - Yahoo IM and MSN screen names