Yesterday I took delivery of my 2021 Cayman after it was lost for nearly two weeks after getting off the ship in Jacksonville. Based on what I read here and on other forums I asked the dealer to check the alignment and print out the DME (ECU) data. No fault codes or other problems; however, the alignment was out of specification and needed adjusting. Not much, but it was definitely out of wack so I'm glad I got it checked, especially since it was free. They actually volunteered to laminate the window sticker without me asking.
I asked them NOT to wash the car. Because I wondered if the delivery delay may have been due to repairing shipping damage, I took my paint light, a flash light, and a mirror and did a very thorough exam. The dealer has a "delivery room" to present a new car to the owner and it's nice and clean with good lighting so I could make a good inspection. The floor was clean too so it was easy to skid around on my back examining everything I could see on the underside. I checked every door gap, verified the flat repair system, tool kit, etc. etc. Everything was in perfect condition, much to my relief.
I'm happy to say the paint is absolutely flawless. I showed the salesman how to use the paint inspection light on my car and then invited him to go the the showroom and examine their brand new Boxter with a big SOLD sign under the wipers. He was astounded to see how many scratches they put in the paint during dealer prep. I reminded him, that's why I insisted they not wash my new car. It will accumulate paint damage over time, but at least the scratches and swirls will be mine, not theirs.
Bottom line: If you're fussy about your paint, especially if you plan to put on a ceramic coating right away, don't let them wash your new car.