I used to let them do it, but since I got a bit OCD with a claybar and everything I'll probably say no, at least on my car. The Pepper White on my wife's car doesn't show imperfections quite so much so I'm 50/50 on that one.

 

Depends on the dealer, I work at a dealer and the wash they have in the back is shared by all the dealers on campass VW, Acura,MINI,Bentley, Lamborghini, Jaguar,land rover, Audi and Porsche. At the wash on the back lot they use microfibers which is good.

 

Was in for my free oil change and the campaign on the 11 sun visor - they washed my JCW and did a great job - in fact they got my white wheels clean!