well. for starters.
you must have a nice camera.
<img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />

Also, I definitely do NOT think you need a belt sander to sharpen that out.
not at all.
start with a coarse stone of some kind and basically just sharpen them out. not all the way though. Just enough to get the edge back on it.
you'll still see them, but after a while they will sharpen out.
my DFLE has had many rolls, but now they're almost all gone.

btw: the edges normally hold up better after a sharpening for some reason...
well, thats what I've gathered from posts.

idk if you know how to sharpen a knife, but it doesn't look like you need to do anything different. Just grind those down, not too sloppily, but you will touch up with a finer stone so you don't have to be too careful.

goodluck.