For those of us who live in northern areas where copious amounts of road salt is used, here is a tip I hope helps. I noticed that there is a 1/4" gap all around the window and moulding of the Gen2 rear door. As we all know crap gets sucked onto the back of the car in large amounts. I noticed even after washing that salt was packed in the damn gap, my solution is to get a soft paint brush and brush the salt out of the gap around the window and moulding. Don't want to give rust a chance to get going. Only takes a couple of minutes of your time.