Hi, I just finished a tele build using wudtone. Really great product, but it's a bit tricky on necks.
The dye based stains work ok on maple necks, but the pigmented colours aren't very compatible with maple. Also the top coat that comes with the wudtone (either clear or vintage tinted gloss or matte finish) I wouldn't recommend on a neck either, it's a bit too thin.
They do a separate neck finish that can be either tinted or clear that just paints on. It's nice and thick and self leveling so after 2 or 3 coats, I just left it to cure and it was smooth and shiny! If you use the body base colour coat on the neck, the neck finish can go over the top of this just fine.
Long story short, if you've got a clear wudtone colour, as opposed to a semi transparent or solid colour, it won't be super deep, but it will work on the neck.
I'm a noob here, so I don't know if I'm allowed to post links to other forums here, but check out pitbullguitars (dot) com (dot) au, and check out the forums there. They have a boatload of info on Wudtone and the Wudtone creator, Andy, even posts there sometimes. A dude named Dingobass is basically the master of wudtone there.
Sorry for the epic huge post. Hope it helps!
Josh.