Of the natural waxes, I think everyone agrees that carnuba is the best. It comes from some kind of palm tree in South America, and is the hardest and highest melting. The pure stuff is applied by dressing a wheel with a chunk of it, and then buffing it onto the handle. It's too hard to do it any way besides heating with friction. With no power tools of any consequence, I've not tried that.
I happen to use something called Howard Citrus Seal. As far as I can tell, it's simply flakes of carnuba wax moistened and partially dissolved with orange oil. For the deluxe wax finsh, put some into a glass jar and carefully nuke in the microwave until it melts, brush it on the handle, let it set up, and vigorously buff. On occasion, I've added a bit of pure bee's wax to it. Somebody on shop-talk forum said that the clear, colorless wax on some Gouda cheeeses (specifically, Laughing Cow brand) is carnuba. I've got a bit I saved from a cheese somebody brought back from Holland, but I've not used it yet. I'll probably just add it to the jar I use in the microwave.
Wax intended for wooden floors, like the original Johnson's paste wax or something called butcher's wax are also recommended. If you bowl, find out what they use on the lanes. That has to be about as tough as you can get. Be careful of stuff intended for car finishes, or linoleum, they can have lots of other ingredients that may or may not be so great for a natural material like wood. I've seen some cautions that people with sailplanes found that such products caused fiberglass to age more rapidly than usual. Simple and old fashioned is the way to go, like the khuks themselves.
I've also treated a couple of leather knive sheaths with a mixture of the Howard product and bee's wax by brushing the melted wax onto the sheath that was prewarmed in and oven at about 150-175 deg F and returning to the warm oven. Hardened up the leather and really buffed up nice.
Renaissance wax is also highly thought of, but I've not tried it. It is a synthetic wax designed for preserving museum artifacts.
Yeah, that tung/linseed oil takes a while to set up after each coat, but the final result is worth it.

All the more reason to wax the final result.