Sci-Fi World Exhibit #4429917: Self-repairing Invisible Military Vehicles
"Tanks that can repair themselves and change colour on the battlefield are being developed in the US.
Military vehicles including tanks, trucks helicopters and weapon systems will be covered with a coating that has been embedded with nanotechnology.
If tanks are corroded or scratched, the vehicles will be able to detect it and heal themselves.
Perhaps most importantly, tanks would turn chameleon, creating instant camouflage and making themselves virtually invisible on the battlefield. "
http://news.bbc.co.uk/2/hi/technology/2386731.stm
Note how they said "heal themselves", and not "repair themselves".