The next time your car is keyed, park it under a ray of sunshine. If your car is coated in a new polyurethane film, the scratch will be gone in an hour.

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Sounds great, Larry, but the picture in the article had a whole lot more damage than just a little scratch.  Quite a bit of metal work to be done before the paint can "heal" itself.  Now if they could just invent a metal that would return to its original shape after a wreck, we'd be set.