It is my experience that with ROO's, the part that takes most of the scratches is the bezel. The ceramic bezel is great in that it is almost indestructible, and almost scratch proof. Typical scratches are almost imperceptible in the carbon because of it's variations in color and pattern. I guess the only real concern, would be a big, deep gouge, which might require a new case. So far, I am not too concerned about that and the carbon has proven to be quite strong. Hope this helps.
Best regards
Victor