Thanks. I realise that the simple fact that the coating makes cleaning easier may reduce marring too.
FWIW, I took my car to a touchless wash, for kicks.
It actually worked surprisingly well, even on non coated panels.
However, as you'll see, the door which has been coated is beading, whereas the other panels are very flat.
Before the touchless wash:
Before wash
A few minutes after the wash. Rear door coated, front door had Reload, other panels bare. All panels recently cleaned with Optimum Power Clean @33% dilution.
After wash
No substantial difference on the hood this time - slightly less water on the coated side, and both sides beading:
Hood
Interestingly, once dry, the coated door panel was actually dirtier, due to the beading. (which leads me to believe the so-called "spotless rinse" isn't actually "spotless").
The spots were easily dabbed away with a moist cloth though.
The car was very dirty - I'm very happy with the results of the touchless wash! (notwithstanding the fact it didn't do much on those lower skirts)