The nanoskin marring may happen to a little or longer extent depending on paint softness, but it also may show up more on darker colors.
It will happen mostly every time you use nanoskin (or clay), the fact is, some cars show more, some show less.
It's good practice to follow claying (and nanoskin) with, at least, one polish step with (at least, again) a fine polish and a finishing pad.
The good news is, nanoskin marring will go away after the first pass. Your defects (swirls, scratches, waterspot stains, etc) may take a lot longer, so you don't have to worry at all.
My tip for using nanoskin is to find the lube that works better for you and stick with it.
That said, I've played a lot with car soap, used car wash'n'wax soap for long, tried quick detailers, all with mostly great results, but my favorite nowadays for nanoskin is free flowing water.
That said, after thorough washing the car, during the rinse, I take advantage of the flowing water and use the nanoskin while rinsing.
Please, keep in mind 'FLOWING' water is way different from using plain water in a spray bottle. Sprayed pure water is 'static' lube and may increase marring - Flowing water is 'dynamic', it's not the water per se that will lube, but it's flow. Take advantage of the flowing water and rinse your nanoskin often as well.
You may feel the nanoskin gliding freely over the flow of water, and you also can see the contaminants (like overspray) being easily removed in 2-3 nanoskin passes throughout this process. Works, great!
It's hard to explain by words (I'm brazilian, sorry), but it's likely you grab the hose with one hand, nanoskin with the other, and while rinsing an area, you use nanoskin over the water flowing. Beware not to drag the hose on car's finish, sure!
It's a straightforward process, and it works very well.
Please, let me know if you need some more help on this, it'll be my pleasure to help you out.
Kind Regards.