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For those that don't know the Atoma surface is very different to the DMT. Atoma pic below:
It's kinda raspy for want of a better word. I don't like the 400 Atoma on razors even badly damaged ones...

The thing to remember with DMT's is that they don't recommend using anything finer than the 325 for flattening. In fact they recommend the extra extra coarse for hard Arkansas stones. The 1200 DMT...