Removing window coating

[Paulrio74]

I tried to search, didn't get any hits. It seems the consensus is that the titanium dioxide is a coating on the inside of the windshield. Has anyone tried, or have a guess, if it could be ground/polished off? I'd like to make a little radar "window" on the window. Any thoughts? My glass is good, not interested in replacing it with a non coated one. If there aren't too many you're an idiot there's no point replies, I'll try it and give a result update.