I have played raw-wood necked basses for years, not all woods are good for this of course, but wenge, ebony, pau ferro, goncalo alves, padauk and a few more are perfectly OK to play raw. Maybe you sweat from your forearms when playing - I don't, but I sweat from my hands quite a lot when playing during the hot summer. Sometimes the neck wood is soaking wet with sweat when playing. What I do after playing is to rub the neck with one of these pads (don't know what they are called in English) and the neck is like new again. Actually better because after playing / rubbing several times the neck get's an almost gloss and very smooth finish to it. These raw necks are the best feeling necks I've ever played...
Here are some pics of my raw necked basses. They have both been played for years. Nothing is uneven, dirty or whatever... (Of course a clean white paper towel and some denatured alcohol will make the paper dirty if I wipe it. It will also get dirty if I wipe the new pieces of wood I just bought for upcoming builds, or if I wipe any other piece of wood for that matter).
Let's not take this further, we will take the thread off topic... We have different experiences and different opinions and I guess that is fine..!? I was just making the OP aware, that a finish is not needed for wenge and personally I would never do an oil finish on that amazing bass, it kills the gorgeous look - IMHO. But if one wants are darker look - oil finishes are fine. We all agree on that.
View attachment 450834 View attachment 450835 View attachment 450836
Yeah, and here's the raw wenge neck on my first build. It's very shiny up close and very smooth and very comfortable and slick to use. It also gets pretty manky after playing, and I worry about moisture uptake. So I take the time to keep it clean, but I do the same to my finished necks.
http://i223.photobucket.com/albums/dd60/hardmark/guitarwork/001/back_1.jpg
And here's the wenge back of a guitar I finished with tung oil.
http://i223.photobucket.com/albums/dd60/hardmark/guitarwork/002/done_3.jpg
The lighting is not great, but I assure you that you can still see the chocolaty contrast even with tung oil finish on it.

