I started using a 1" strip of sandpaper and mousepad neoprene clipped onto a longer scrap of hardwood. I would just keep a few laying around. I use that for cleaning up machete edges instead of a file. It's fast and keeps the edges convexed.
I just watched a knife review and the person was talking about "Touching up the edge". He said to use one of those thicker, kinda foam sandpaper covered Nail Paddles! I know you've seen them in stores. They look like a regular sandpaper fingernail "File" but they are thicker and sometimes have a different grit on each side. Genius. <img src="/ubbthreads/images/graemlins/doh.gif" alt="" /> <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />
