Garmin 430 screen

[stapler101]

I cleaned the screen on my 430 with the same cleaner I clean my windshield with and it apparently took some of the anti-glare coating off. It is a spot about the size of a silver dollar (probably exactly where the spray hit it).
There is no change in functionality, it just looks "bad". When the unit is on you can't see the spot.
Is there a way to repair this without replacing the screen?

 

[GM.]

 

[skywag]