I don't know who really developed it..... but Nissan also claims to have invented it and is now licensing it out to cell phone makers.
[
www.autoblog.com]
Just Google "Self-Healing Paint" and you will get a ton.
From 2005 (been around a while):
[
www.timesonline.co.uk]
I don't know why it is not ubiquitous by now... either doesn't work as planned or just too expensive. Dunno.