nano-technology paint

Military & Aerospace Electronics Current Articles
This is all well and good, but what happens if it gos crazy? what if it's ability to repair cracks turns into an ability to disolve anything it touches, turning into sludge? Not very far fetched when you consider that it would need some ability to create something usable for filling the cracks it would repair. I'm still quite a bit scared about nano-technology to be too supportive of it...