Does the new antenna have a scratch proof coating or is it the same as iPH4. I really want a bumper as the case allows it to stay thing, but protects from crashes. I've heard that dirt always gets between the bumper and the antenna causing scratches. . .this will affect the resale value next year to fund my next iPhone Is there some kind of Apple thing you can buy that wraps around the antenna protecting it. Then I could put a bumper over that knowing that the dirt would just scratch the protection instead? Like sticky tape of some kind that I can peel off next year when I'm selling?