How are nashiji finishes accomplished?

[calc]

Can any kurouchi finish be converted to nashiji?
I have a 10 year old nakiri and the finish is wearing unevenly, I've been toying with the idea of removing all of it but I don't want to go all in on polishing. Some knives like the Yoshikane SKD have a really nice look to them that I'm curious about trying to replicate.

The knife I may consider wanting to modify,

and the look I'm thinking about:

Any advice is appreciated, even if it's just talking me out of it. Thanks!

 

[Veitchii]

It looks like you would need some sort of loose abrasive or a sandblaster to remove the KU without taking the roughness with it. I've never done this myself, but that's how I would go about it. There are ways to "sandblast" without actually blasting sand. Put some loose abrasive at the bottom of a tub if water, and use a funnel to scoop it up. Plug the bottom with your finger so that the funnel is full of water and abrasive, then raise it up high and let gravity do its thing. If elevated enough, the flow of water and sand could be just right to remove the blackness.

In all likelihood, the stuff above isn't going to work effectively, and its probably not worth the time and money. You could try rubbing with some loose abrasive or scrubbing with a (relatively) gentle pad of some sort. Do note, though, that if you make a scratch in the kurouchi while trying to remove it, you will see it forevermore until you bite the bullet on a full polish.

All food for thought. Hopefully someone more knowledgeable than me will chime in.

Good luck!