Haven't read the post of the dealers messing up the paintwork here yet, But I can assure you some do. I've been detailing for quite a few years and have had plenty of new cars come to me with wonderful dealer installed swirls and holograms. When i ordered my 12' sti I made sure they knew not to touch the car besides putting it in the lot, do take the plastic off and not to drill any holes or add any dealer stickers. The sales person wrote it all on the order form.
Etnpnys if you could get them not to prep it that would be great.