If there's a rainbow effect, this is probably not just a damage on the AR layer. There must also be a dent in the glass, I don't think of any other explanation.Sorry, I should have clarified.
It has a noticeable scratch in the antiglare directly in the middle of the screen. Creating a rainbow effect visible on flat colors (like a blue sky, etc)
If I can manage the issues of removing the antiglare just by playing it in the dark, I would happily do that.