As noted, "tung oil" can cover quite a few things. I've used Formbys' Tung Oil and Tru Oil on grips, rifle stocks and canes, with good results. The formbys' is formulated for furniture finish, of course, but has been durable on the handles of canes where it gets heavy abuse and exposure to sweat. Tru Oil is a formulation based on tung oil, but contains brighteners and penetrants which do more, IMO, to highlight good woodgrain. Most of the result, once you pick a good oil, is in the technique. Sand the wood smooth. Strippers and finish removers aren't necessary, and can dull many woods. Apply your oil with a fingertip, spreading the smallest amount you can get on a fingertip over the largest area possible. Set them aside, and let them dry until that coat is hard. Then, steel wool them down with 0000 steel wool, to the bare wood (there will still be oil there, just won't seem like it). Repeat this until you are satisfied with the finish. Usually 4 to 8 coats will provide a good finish, and show off the grain well. Top the oil finish with one or two coats of a good, hard paste furniture wax (Johnsons' Paste is excellent), and you have a finish that will last, and can easily be touched up if nicked, dinged or worn. I've seen some really exotic grains continue to light up and show additional "fireworks" up to 40 coats of this application, so the final can be up to how patient you are, and the quality of the wood.
