I came across this:

335i Coupe M Sport Package in Germany undergoing color conversion by foil / tape - BMW 3-Series (E90 E92) Forum - E90Post.com



After completion:



Vendor website: foilacar - GERMAN QUALITY

Before:



During:





Completed:



Not my cup of tea, but it certainly beats the hell out of using paint. The warranty is around 5 years depending on environmental conditions. To return the vehicle to its original paint, the vinyl is simply peeled off. Estimated cost is around $1500-$2000 as per e90post comments, probably for materials only.