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I wouldn't use pottery pigments on my razors unless minimum mesh size of .5 micron is guaranteed.
Particle sizes are not always consistent & anything up to 40 micron could be present.

Water or slurry finish is mostly dependant on the stone.

The CrO is finer than Jnats especially as it is embedded into a soft substrate. As with using a .5 micron stone it is a quick n easy way...

You wanna know the best way to max out a Jnat ?
Do 5 strokes on a Gokumyo 20k to finish :roflmao