I use Formby’s Tung Oil commonly found at any big box hardware store. Clean action with acetone or alcohol and using a 3/8” camel hair brush apply liberally but not enough to run. Oil self smooths and dries within a day in a dry climate. Maybe two for a more humid environment. Formby’s has so little solids in it that when dry only a very thin coat remains and does not fill engraving cuts. Easily removed with alcohol or acetone. Be sure none of the solvents touch the wood finish. By far the best and most attractive finish I’ve ever seen. I also use the same process on damascus barrels. Would really brighten blued steel barrels too.
