yeah, check out some Junkman videos and make sure you are washing your car with the proper techniques. Paint is soft on the Z and it doesn't take much to create swirls from washing especially on a black car. Do not buy your wash mitts and microfibers from Autozone, Wal Mart etc.. there is a huge difference in quality. Check out
https://www.theragcompany.com/ or
https://www.autogeek.net/ for quality products.