This is the ebony fretboard on a project I'm working on (I still haven't decided between lined fretless or fretted). This is the worst chip on the board (well, two of them). There are some "chatter" chips up higher. What it the best way to repair that? I have heard using ebony dust and glue, but I don't know that I will be sanding that much more of this board to get more dust. Any ideas? Here are some of the chatter chips in the treble side from frets 9 to 13. Not a great picture. They are very shallow.