The last BMW i bought i told them to just remove the cosmoline protective wax that its transported with, and not apply ppolish or wax. I was going to give it the full Zymol hit the day i collected it. The valletting guy was cursing as it was an absolute bu66er to remove without the normal petrochemical products they'd use.
At the same time i spotted their chamois leather draped over the top of the brick wall, and being jet washed - oh my God

My car was spotless in fairness - must have been lucky
At the time the valletting company were being paid £25 to prep a new car including removing all plastic and cardboard packaging ! The guys themselves must have been on less than a fiver an hour !