The only basses I ever waxed were my Warwicks. When you say "neck" do you mean "fretboard"? Don't wax your fretboard! If you want to shine up your bass (body, back of the neck) then you can use beeswax but, since your instrument already has a finish on it I wouldn't see waxing as being necessary. For your fingerboard you can use any number of products, from boiled linseed oil to Planet Waves Hydrate. When it comes to fretboard conditioning you're going to get a lot of differing opinions on what works best. Some folks will tell you to use lemon oil while others will tell you to steer clear. The good news is that if you have a maple fretboard then you don't have to condition at all. I'm wondering though, what do MTD owners use on their fretboards?
A few things...
+1, DO NOT wax any fingerboard.
I personally wouldn't wax any MTD. It'll make it shiny, but only because it's building a layer of wax over the existing finish and wood, which I would not ever want to do. The finish on the MTDs is durable and good. Just clean it off with a damp cloth and call it a day.
What DO you do with the fingerboard? Depends on the wood. If it's maple, it's already got a finish on it, and needs no more care than a body would. If it's an open grain/oiled wood like rosewood, ebony, etc, then CLEAN it with lemon oil (but only as needed!), and don't let it sit on there. Wipe it off right away. Treat it with a heavier oil, like Dunlop 02. The possible exception to this is a "stabilized" fingerboard, in which case it's literally got finish integrated/infused into the wood, and may need no more than wiping off as needed (no oil could soak in anyway).
There's LOTS of debate over what "lemon oil" really is, and honestly, the products vary just as much as opinion, so it's understandably confusing. For me it's just easier to always think of it as a cleaner, not a conditioner... if for no other reason than the fact that it's thinner and will do a good job cleaning. Then I use an oil that is specifically designed to treat for treatment. The problem with using cleaner oils, is they'll tend to wick the natural oils out of the wood over time, and ultimately do more damage than good. Depending on frequency of use and playing, it might not matter, but just the knowledge it's doing bad things... even on a small scale, makes it "not worth it" to me... especially when the proper stuff is so readily available and costs so little.
Finally, only clean/treat a board when needed. Don't just do it out of habit. Depending on players hands/sweat, climate, and frequency of gigging, it could be a much longer or shorter time between cleanings and/or treatments.
Just use common sense and you'll never have a problem.
