You've carried a budget CRKT for 15+ years and it still functions for you? Bro you don't want to refinish that, be proud of her wear!
For a crkt that's unbelievable! Way to go keeping up with maintenance and keeping her going, really says a lot about you caring for budget tools like that sir. Congrats.
Again man, let that thing show its use and be proud of it, you don't refinish something like that!