Ok, so got the car back from paint and working through all the visible exterior details. We'll some yae hoo scratched the back glass long before I had the car. Anyway I've been using brand x glass polish with some success however I think it's as best it will get.
Sorry I can't post a picture at this moment, it's kind of difficult for the camera to pick it up. I will try in different light.
I got a polish kit from amazon that had course and fine polishing compound complete with roll-loc buffing pads. it wasn't cheap but it worked well. sleek