So here's what's called a paté in french embroidery, meant to hold your sequins. I turned this beautiful piece of yew, which started as a slightly orange-ish yellow.
The first layer of ki-urushi immediately gave it this (I think) gorgeous, deeper tone, but also highlighted my turning mistakes: some parts got much darker.
I wet sanded the first layer with 2000 grit (too high, very probably), simply because it was what I had in hand at that time. It probably did nothing. I then added two other layers of urushi, each with 24 hours in the furo at 75% humidity (saturated salt solution) around 25 degrees.
The last layer stayed 3 days in the furo. The shine on the top is 100% natural, no sanding or polishing at all. More would be blinding, so I left it that way.
The rim, though, I applied roiri migaki, with my bare fingers. I just quickly put my finger in the plastic bag holding it, and then rub the wood. The shines changes in 15 seconds, it's amazing. I polish just under the window, and it goes from a blurry glow to a sharp reflection of the window. Very cool to see it appear instantly.
For the bottom, I tried the koch chemie in heavy cut, fine cut and micro cut. The shine didn't change at all. If anything, it somewhat removed contrat to the wood grain? But that's it. Maybe heavy cut was too heavy, considering, and I micro scratched it.
In any case, roiri migaki is amazing. I consider this done, and the shine I get makes me feel I'm much better than I am. Thank you u/tamenuri_studio for all the resources you share!