well you can take some superfine sandpaper (like 600 grit) and work it down a little, then smooth it out with some 1200 grit(it's like cloth) which is what I did with my Nylratron. Do it a little, then test it, then sand a little more, etc.
You should consider a Delrin ball detent like the one by Shocktech to reduce the wear on your bolt.
