Coatings that 'self-heal' in sun

From BBC News (March 12):

Scientists have devised a coating that when scratched heals itself upon exposure to sunlight.

The secret of the material lies in using molecules made from chitosan, which is derived from the shells of crabs and other crustaceans.

In the event of a scratch, ultraviolet light drives a chemical reaction that patches the damage. [more]

The article said the coating works on car paint. Just imagine the possibilities. Self-healing wallpaper, sunglasses, Saran rap, upholstery, etc. It is almost as if it's alive like skin.