Just out of sheer luck, try cleaning it with a good eyeglass cleaner. I had a fella come in my office and said he scratched his brand new glasses after getting into a spider web and freaking out, dropping the glasses on concrete. He brought them in and they sure looked mighty scratched(even to me...been doing this for 20+ years).
Since there was still some cobwebs visible on the frame, I decided to try cleaning them. Let me tell you, the cobweb strands stuck like super glue! I cleaned and cleaned on them and all the "scratches" came off. They were just cobweb strands. Craziest thing I've ever seen.
Maybe, just maybe.....
Doubtful, but you never know.