Tcurry, looks good. You ask about polishing buffalo horn, sand to at least 600 grit, and then buff lightly, if you don't have a buffer, you can use a piece of thin leather with white buffing compound on it and buff it with that by hand. The higher grit that you sand to the better the shine, also the slicker it will get in use, but it looks like you have put in some file cuts for a good grip.