I use 100% tung oil as a gunstock finish when I build custom rifles. Here's my source:

https://www.realmilkpaint.com/shop/oils/pure-tung-chinawood/

Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!