You could make an attempts using a scratch remover, which are available for scratched screens. There is some chance that it gets you there, though it depends on too many unknown variables to know for sure.

This. If it has the same index of refraction as the screen, it may fill in the damage and make it invisible. It might help to know if the screen is acrylic or glass to choose the right one. The poster has nothing to lose, sounds like.