Blue is a fantastic car color but it can indeed show scratches, dings, etc. well. FWIW, I had 8-9 years and 150-185k miles on my previous 3 cars with a decent amount of mountain pass and gravel road driving - paint looked good/great on each at the time of sale. Some road rash and paint swirl. I thought about PPF on the G and SQ5, but passed as turns out it's expensive ($1,000+) and will have to be replaced if you intend to own the vehicle for 5+ years. I don't do anything grand to keep paint looking good - simply weekly washing (usually touchless drive-thru car wash) and carport parking at home.