The reason I asked the question is that I used it on a black MB SL
and the restults were amazing (this is a concours car) After reading Sal's website I found it hard to believe it could get better (I apologize for thinking it was all hype on Sal's part)
I think the only people at a car show who would have to worry are any that are not using Z8
Tip: use Z8 48 hours before the car show and then agin when you arrive...good luck
JonM