Sharpening kitchen knives has been a hobby of mine for a while, and I'm more interested in that than honing straight razors! The DMT 325 is a great shaping stone. Agressive, but the scratch pattern is easily removed by finer stones.
On your Henckels or Wusthofs, the rockwell hardness is pretty low, actually. They made these knives to be tough, but not particularly sharp. When I sharpen german knives for family/friends, I max out at 1000 or 2000 grit. The steel just doesn't have it to go much higher. I sometimes go 4 or 5k like jendeindustries, but the edge holding isn't there. A toothier 1000 grit edge lasts longer.
you can use your 12000 grit stone only if you like wasting time and stone.
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