May I ask how you deal with threads? Don't apply the urushi to them or only a final clear coat? Do you recut them after? Do you purposely make them a loose fit to allow for the finish? How much extra clearance do you allow so that when parts are put together, like a cap over a section, there is no damage to the finish of the parts.
Almost all of the above
- i make threads just slightly (! Slightly !) loose, usualy by sanding with mircofile (triangular crosssection, used by warhammer figures creators). It makes them also accept pigment lacquer better.
- i put 3-4 layeres on threads, sometimes more. After each of them i check parts (asemble the pen) and correct (scalpel and same file again.
- if pen design requires this , ie cap goes over body etc, i sand for some clearance bofore first layer, usualy just tenths of mimimeter. I also check along the way. I also choose design accordingly ( no ishime on such pens)
- final coats (uwazuri) are almos nin existent (less then 0,01mm total of 6-8 coats) as they are wiped off. So final check and corrections ate done boferole uwazuri. Later just perfect wipe of threads during uwazuri, geting rid of migakiko powder which loves to get into threads
And remamber - I am not an expert. It’s just my trial and error knowledge. A lot of errors