Full body skins will cover the antenna band and screen protectors the screen, but what about this area between the two? Can the chamfered edge be skinned or protected somehow?
None of the skins I've seen have coverage for the chamfered edge. Since it's such a narrow strip, it would be too difficult to apply a separate piece along this edge. If a one-piece full-body skin were available, it could wrap along the entire phone at meet at the back, but this would create a seam (and possibly other problems with fitment). From what I've seen, best to go with a case.
Check etsy.com in the future. I did see one person selling skins for the plastic lip around the glass for the iPhone 4/4s so maybe they'll make one for the iPhone 5's chamfered edge