You’re not going to be able to avoid swirl marks, but to keep them to minimal i would absolutely recommend washing your car by hand. Investing in some decent microfiber cloths, as well as looking into the two-bucket wash system with grit guards will help too. I bought the black RS, and after only 8 months of owning it, it’s already has swirl marks in it. To answer the first part of your question, you should be fine. I’ve taken my blazer through the car wash with no problems. Though, I’d recommend you take yours to a touch free wash, and not the regular car washes as this will cause scratching and swirls. Enjoy your new car! Luckily you won’t be able to see ALL the scratches with silver. Black is hard to avoid them with.