I cannot completely disagree with your idea. However, my first thought is that since @royslead indicated he was not sure of how much clear he had, it might be safer to lightly sand with 600 or maybe even better with 800 (since it will remove less material) and then spray on some more clear. Plus, he said he already sanded through the clear in one spot that was low and would not be very noticeable. My fear is that no matter how careful he was, he could burn through the thin clear. Then he would definitely have a problem. @67Dart440GT suggested a grey scuff pad (equal to about 600 grit) around the edges after the sanding. Not a bad idea at all. I would definitely use a soft sanding block and wet sand with 800 and then spray more clear. I feel that this would be the safest.
