I've found it to be hit and miss on factory wings. Some aftermarket wings allow it, haven't been able to do anything on the 4za Aero package at all, which sucks.
Between that and no license plates on chrome bumpers and side trim slash emblems you can't remove ala the Galaxy Wagon or the 73 Ford or 71 Mustang, there's more than enough to frustrate anyone wanting to what they really want to do.
If there was one thing I could change, being able to paint and or decal these surfaces or remove them entirely is it. You can take the bumpers off some cars, but not the wood grain trim on the wagon...? Silliness indeed.