I know there has been a previous post on the topic, but it was not specifically dedicated to talk about scratching of the tint.
Background: Today I phoned a few tinting shops to ask for quotes. One of them said that there's a problem on all BMW's since 2010. Behind the door panels there is a foam blade underneath which sits another rubber blade. Apparently the foam wears and dirt gets trapped in the rubber blade which can scratch the tint.
So this one tinter said they would cut away the rubber blade since it's a known issue.
I was both glad and irritated at the same time!
Supposedly the 5 series is even worse with a double rubber blade.
My immediate reaction is there is a design reason for the blade's existence. It may be for water protection of components such as speakers, central locking... or even for accoustic reasons.
Couple of questions:-
1. has anyone with an F30 experienced scratching of the tint yet? If so, was it aftermarket or factory?
2. has anyone agreed to have the blade cut away?
I've done a search and it is a known issue in the E90 forums.