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Feb 10, 2011 at 20:57 vote accept carl
Feb 9, 2011 at 16:03 history edited freiheit CC BY-SA 2.5
added 84 characters in body
Feb 9, 2011 at 6:36 comment added David LeBauer nice answer; I would add that if there are many pieces of rock/grit on a pad, it is sometimes easier to scrape off with a razor blade than to pry them out.
Feb 6, 2011 at 20:32 history answered freiheit CC BY-SA 2.5