I'd go with the pad that cuts the best, whatever resembles felt the closest. If I'd seen the post earlier I would have chimed in with either the Autoglym you used or a product called cerium oxide. It comes as a kit made for polishing glass. JC Whitney sells the kit of the powder plus a felt pad, about 3 inches that fits into a power drill. Mix up a slurry and go at it. I removed wiper scratches on the wife's Camaro about 3 years ago and the windshield is perfect so it would eat water marks for breakfast. The kit was cheap and I still have tons of product left. Cerium oxide is used in the astronomy area to polish lenses so it's made for glass.
-John C.