I ordered a fretless maple fingerboard neck from Warmoth last fall and installed it on a Precision. Warmoth applied their gloss finish oer the whole neck/fingerboard.
I use TI Jazz Flats, and now that I'm playing it all the time I'm seeing some faint tire tracks on the fingerboard.
For $15 Warmoth installed and cut a nut, and it works fine. I bought Schaller tuners from Stewart-McDonald, along with a string tree (I don't care for the round Fender kind).
Installation is straightforward: I put the tuners and string retainer on the new neck, then took the strings off the bass, removed the four screws (note: lift the neck out of the pocket: don't try to slide it forward because that won't work).
Then I bolted the new neck in place, strung it up, and off I went. The neck as shipped was adjusted properly, and I haven't touched the truss rod. It fit in the neck pocket snugly, and the whole thing (lack of Fender decal aside) looks like it came from the factory.
I really wanted the look of the unlined maple, so Warmoth was the way to go. I'm pleased with the quality of the neck, and the bass turned out killer.
Everyone's seen this link by now, I'm sure, but here it is:
http://www.flickr.com/photos/19652150@N02/2068468907/