When I bought my Ute there was a large sticker accross the rear window advertising the company which I didn't want on.
I asked them to take it off as I didn't like it there to which their reply was that it has a special glue on it so it can't come off, yeah sure I'm not that dumb.
My reply was that if that was the case then I would charge them for their advertising on my car and the rate was $1000 per year over the 10 years that I expected to keep the car, I would also expect the payment up front in the form of a discount of the price. If not then I would take my business to another dealer.
Guess what the sticker amazingly came off within minutes.