Depends on what wood, how well it has been seasoned, and under what conditions. Deacon Deason of Bear Hug Grips used to keep his prime walnut,seperated by small blocks, in temp and humidity-controlled kiln for _seven years_ before he cut it into grip blanks. This is the most extreme seasoning that I know of. The woods used in Khukuri handles has obviously had some seasoning and has travelled through several climates before reaching you. It is obviously not green, but has seasoned, gathered moisture (to a very slight extent, as it has been oiled/waxed enough to show the beginnings of the grain) and dried a bit in its travels. I've sanded and steel-wooled mine, down to the bare wood. I use a commercial linseed oil with a penetrant that helps carry the oil just a bit further into the grain. Sanding between coats, I'll put as many as 20 coats on a piece, depending on how much more grain detail shows up with each coat. The wildest pair of pistol grips I ever finished was a piece of Pao Ferro, which finally showed red, orange, gold, and a base caramel color, laced with thin black veins. The grand finale wound up at 70 coats. Each sanding (or steel wooling) should be very light, and the amount of oil applied should be the very least you can get on one fingertip.The neat thing about foreign woods is that you never quite know what to expect, and if the bug bites you before the boredom sets in, you can add Woodchuck Syndrome to your KIKV. My new Kobra handle is now drying under it's eighth coat. It shows the caramel base color, bright golden flakes of sap vein, and a black vein is beginning to come up.In sunlight, whether due to bad eyes or refraction, there are some very small glints green. This may call for more coats
The other good thing about this finish is that dents are easily lifted with a wet washcloth and steam iron, and refinishing is just a couple of coats in the area of the damage. Final coat is Johnson's Paste furniture wax. It will harden, but still be just a little tacky under pressure of a hard grip, and is easy to re-do when sweat marked, etc.