Tried to get the sand wet. Do not worry. The abrasive, like a whetstone, will flake off any edges you put into it. Nothing comes close to 3m or Meguires in terms of durability/quality. They are made in China and the markings on the back make it difficult if not impossible to tell which size you are using. Revain would have done the right thing by removing that line from its stock.
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