nberry,
The 3M works on plastic,glass,fiberglass,metal. I bet it wouldn't have any problem adhering to that flat surface.

Have you guys seen this video before ?:
http://www.owners.ferrari.com/video...ngeStradale.wmv

How about this short one ? It's a shame the guy lets off the gas:
http://www.cavallino.cc/index.php?section=stradali/ferraris/modele/360stradaleV

Nothing can beat that sound imo.