Electronic Painting

[Prometheus]

Security-minded U.S. decorators' supply outfit, Force Field Wireless, claims to have developed a do-it-yourself solution to the international menace of marauding geek wardrivers: DefendAir paint 'laced with copper and aluminum fibers that form an electromagnetic shield, blocking most radio waves and protecting wireless networks.

See the details here

thats really strange kinda....kinda excessive