I used Chipguard for 3m tape...ask for Mark Legere to do it personally...been doing it longest. I had my Infiniti done twice, by him the second to do it right. If you have a dark colour car it ripples and bubbles are more noticeable.
PS- Don't pay for it at the dealership btw....these guys do it for Downtown BMW themselves and charge half as much if you call and deal directly. I think it was $200-250 hood and fenders.