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Expert rating8.4
Public rating8.5
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Any damages to the car body, be they big or small, are hard and expensive to fix. I suggest to use memorized shape materials for the car body so that any damages, or just small one for the beginning, could be fixed instantly. Just push the button and the car body becames fresh new again.
Here is another huge market: make a face of a shape memory material. Just press a "safe the face shape" button when you're 20 and then "restore the face shape" button at any age you like:-)))