A few years back a member from Ireland has his LS430 wrapped in a shiny blue Cadburys dairy milk foil colour, it did look the business. I watched a BMW being wrapped next to my old workshop at one time, a dark mat grey. Every time someone touched it it marked, a bit like stainless steel does, and what do you do if you get a light scratch, it can't just be polished out. I guess it isn't the most practical finish.