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The CrO is approximately the same micron size as the 30K Shapton. The CrO does indeed smooth the edge of the 30K. It is like adding Carnuba Wax to the edge.

bj

I've had the 30K about six months or so and use it at the end of the progression with my other Shaptons. I use it after the 16K and before the CrO paddle. When I need a touchup I use the 16K a few...