If I may give a bit of advice as a retired Finisher about your Jogja hilt and scabbards in general .
These urethane/stain combinations are bad for achieving a finish that would be acceptable within the culture .
I would suggest either some form of 'Lac' finish, or failing that , tung or gunstock oil; Watco oil is also an option .
I would strongly advise against using any artificial/plastic formula for finish .