Almost wa handles were finished fine polished, because it needs water resistance and a beautiful surface.
However it have the handle slip in some case. example, slicing pull cut for the sashimi foods, fillet a finish by deba and using woodworking.
These cases were made by us.
dimple uneven finish by carving knife, spoon knife.
for deba knife, to get a fine glip
for iron file
These are Japanese carved nomi chisel knives. You can use western carving, spoon knives.
It's a checker line finish, It have used in some woodworking knife manufacture