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I just put a little water in the bottom of the blue plastic holder and let the 4k rest in it, then just flip it and go. When I flip back over to the 8k, it's wet enough to use. Easy peasy.

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You don't need to work up anything on that stone. Just soak the 4k grit for 10 or 15 minutes and go to it. Works great with just the water.

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