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Car Paint Changes With Temperature
PlayfullyClever writes "It's now common to build materials which can change colors depending on their surrounding environment because of progresses made in colloid chemistry. But now, German researchers have gone a step further. They've used ion bombardment and gold metallisation to produce new particles whose bonding behavior can be chemically tailored. This could lead to new shimmering car finishes which can change with temperature or humidity, new cosmetics, but more importantly, to new applications in optical data processing"
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According to a friend of mine, helicopter mechanic, they already do this to some degree. The gearbox for the tailrotor is painted with a paint which will change colours if it is goes over the maximum allowable temperature. It does not change back to its original colour after cooling down.