Just found this through a search on Twitter (via http://twitter.com/simonefried ). An amazing mirror-finish Bugatti Veyron is exhibited at VW’s “Premium Clubhouse”. According to MotorAuthority, the mirror-finish Veyron was developed as a piece of artwork by Olaf Nicolai and is not intended for sale.
Bugatti has another similar design with reflective paint job. The Bugatti Veyron Pur Sang is all-aluminum. It’s the standard-issue Veyron without the colors. Revealed in 2007, there are only five of them built. Source: Autoblog