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Nissan Motor announced it's devised an automotive clearcoat that repairs scratches on painted car surfaces, including those created by fingernails, car-washing machines and vengeance. The company's "Scratch Guard Coat," which is effective for three years, contains an elastic resin that helps not only keeps scratches superficial but also will return to its original state "anywhere from one day to a week, depending on temperature and the depth of the scratch," a company release said. No word yet on when the product will be available on Nissan cars.

Let that Be a Lesson: Revenge [internal]