No pics right now, but all you need is a 4" or 6" dia piece of pipe maybe a foot or 15" long.
Mount the sandpaper lenghtwise on the pipe.
The black automotive sandpaper is adheisive backed. They are maybe 4"x10". I had 3 grits mounted on one piece of pipe. I want to say 240 grit, 800 grit and 1600 grit. Then just push the broadhead the length of the sandpaper, rotating the broadhead between strokes, then moving to finer grit.
I did this before Roger Rothhaar showed me how to do the same thing on a bench grinder. It is MUCH easier and faster with the bench grinder.
Here is the best way to sharpen a 3 blade like a Snuffer or Woodsman:
http://tradgang.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=1;t=031172 Monty Browning was at Kalamazoo this past weekend and does his the same way, going to a finer wheel and not even using the flat stone.