J Neilson has a tutorial for touching up a blades finish. I cant seem to find the tutorial, so I'll describe the process. You may have to use a little more elbow grease, but I'll bet it will work for your knife too.
He puts a sanding block in a vise in a horizontal position and drags each flat of the blade, starting at the guard, toward him. Apply firm pressure till you get to the tip and reduce pressure, just a little. Just go one direction or it wont look good. Start with 220 doing all of the flats and go to finer grits till you are happy with it.
Lin