Does your ball stay in a cold area when you are not bowling? If so that may be the problem. I keep my bowling balls in my trunk throughout the winter and notice several "white" spots throughout the ball due to the cold weather. Once the ball warms up and makes contact with the lane a few times, the spots tend to go away, but not always. A resurface may do the trick, that has taken those spots out of my equipment. If not, then I dont know, could be a coverstock issue.
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The only thing good about 2 lane courtesy is more time to drink beer...