Take a look around frets.com where Frank Ford might have something to help you.

The winder of course is quite fixable with a simple reshaping of the offending edges. There are better winders too, like the Planet Waves (a D'Addario brand) which fits mini machines and regular ones and isn't so deep.

Your problem is fairly common on shaped pegheads like F style mandolins but Bruce's advice is good about the finish...get Martin's advice. I think I'd bite the bullet and send it to Martin for repairs, or grin and bare it as is.

Peace, Mooh.