Sand your wood right up to 2000 grit. Then try Tung oil mixed 4 to 1 with isopropyl alcohol (4 parts alcohol, 1 part Tung oil). Sometimes I'll even mix it 10 to 1, if it's a winter project and I have plenty of time. The thinner the coats, the more impressive the final effect. I'll put on at least a dozen coats at 4 to 1, and twice that (or more) with 10 to 1. Yeah, it takes a little time...
Wait 24 hours between each coat and give it a very light sanding with extra fine steel wool before applying. When you get enough coats on, the finish is rock hard and the wood has a three dimensional effect like you see on ultra high end rifles. It's as if you can see into the wood - it's absolutely gorgeous and extremely durable.
You can get a usable finish with any product, even urethanes, etc. But, if you're willing to go to the extra trouble you can turn a very ordinary piece of walnut into something that looks like it came from Holland and Holland. And I'll vouch for the durability, my zip code gets 180 days of rain per year and I'm sometimes on extended hunts for weeks at a time.