I have a midnight blue MacBook Air (which I haven't finished paying for on the interest free yet!) and I accidentally dropped this morning, resulting in a chip on the case. It is at the opening edge and feels rough to the tough. Whilst it is only small I am concerned about it getting worse and because of the midnight blue case it is noticeable. Is this the sort of thing the Genius Bar might be able to repair? I know it is out of warranty and I don't have AppleCare+ so I will have to pay myself. Thanks for any info.