I wanted to "speed up" the glossy neck on my PRS, adid the following after some advice from the guys on the PRS forum.
get yourself some Micromesh, ( I got mine from Stewmac), and work through the different grades from 1500 upwards. First, the neck will go matte, but as you progress through the grades, it will start to polish up. It will eventually end up looking like glass, but will feel astonishingly smooth, with no stickiness at all. Micromesh is genius stuff.