Just for the heck of it, I checked out our 2 cars sitting in the garage.
My 2010 E90 MSport SA has no rust, but a few spots on the frame and motor housings show signs of oxidation. Not rust colored at all, just slight white-ish oxidation.
My wife's 2011 E91 Germany has no rust and shows no signs of anything negative.
Both seats have decals on them from Lear Corp.