Busting rust with light: New technique safely penetrates top coat for perfect paint job

To keep your new car looking sleek and shiny for years, factories need to make certain that the coats of paint on it are applied properly. But ensuring that every coat of paint -- whether it is on a car or anything else -- is of uniform thickness and quality is not easy. Now researchers have developed a new way to measure the thickness of paint layers and the size of particles embedded inside.

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