I've used drill bits wrapped in sandpaper of bass nut slots. 320 wet or dry, or there abouts.
Not really wrapped, more like folded (not creased), with the drill bit providing support and shape.
For guitar nuts, the fold-out variety pack of little files to clean welding tips work. Under $10.
My Bronco don't like people laughin'.
Last edited by GlennW : 07-20-2013 at 06:14 PM.