Using UV light to heal scratches

Researchers at Case Western Reserve have developed a special polymer that changes its structure when exposed to UV light, the polymer is made up of lots of tiny molecular chains that are held together with a glue of metallic ions. When you shine a UV light on it, the metallic ions stop acting like a glue, and the chains separate into a liquid that fills in any cracks.  Once the light is taken away, turns solid and smooth again. The process happens fast enough that you can just wave a handheld light over the surface you want to fix and it’ll be good as new in about 30 seconds. How amazing would it be to have that as a coating on your car?

Source: Dvice