Glass refinishing/buffing

Thanks for the reply. As far as I know, this is OE glass. I havent actually seen the car in person yet. This is the description my friend on the west coast (who inspected and bought the car on my behalf) gave. In the photos I have, you can clearly see the rust runoff on the passenger side taillight and rear bumper. I have better pics of the rear window, but none of them show the defect.