A bit of advice on tung oil & tru-oil... use both. Apply liberal coats of tung oil until the wood stops absorbing the oil. Usually this is about three coats depending upon the wood (I've never worked with korina), and it will really show-off the figuring of the wood. Let the body dry for a week, then begin to wipe on your tru-oil applications in VERY THIN coats. Tru-oil contains hardeners (varnish) and will not soak into the wood, but build up on top of the wood surface in layers to protect the body. Apply as many as three coats daily. After every third coat, allow one day to dry and wet sand with 1500 prior to applying your next three coats. Apply 12-15 coats of tru-oil using these instructions and you'll have a beautiful finish. Allow a final dry time of three days, wet sand, then hand buff with Meguiars auto polish-- NON-ABRASIVE formula!