glass polishing

Not sure. What I do know is that polishing can pretty quickly change your optics (things will become all distorted ie. bigger, smaller, kind of like a magnifiying glass) if you do it too much. Just thought I would point that out. Most everything I read recommends against it since most scratches that the owner would actually want to buff out are actually too deep and would cause this ditortion by the time they are fully buffed out.

 

I agree with Bela, If the scratch is deep enough that you can feel it when you run your finger nail across it then it's probably there for good. If you do polish your glass do it with extreme care because one little mistake and you'll be worse off than when you started.