I know there are many threads on screen protectors.... sorry
I don't personally have scratches on my Maxx's screen but my son had one on his GNEX. He bought "xo skin" screen protector and it essentially filled the scratch. I was quite impressed. I guess it goes on wet like window film. Again, I have not tried it but saw the end result and it was impressive. With so many people inquiring about scratches after the fact, I thought I would link it.
Motorola Droid Razr Screen Protector The Best Motorola Droid Razr Screen Protector | No Orange Peel | Hides Fingerprints | Clearest Screen Protector - $13.46 : Screen Protector | Screen Protectors | Shield | XO Skins