On a recent trip to Scotland my car was bombed overnight by a seagull. A single strike in the middle of the windscreen. In the morning I soaked the offending concrete-hard sh*t with water and gently rubbed with a cloth until it was removed completely. Obviously the seagull had taken in some sand with his fish supper because now I have small scratches all over that area. Large enough to see when the sun shines (not often in Scotland) but small enough not to be able to feel with a fingernail. Does anybody have any good ideas on how to polish out the scratches without damaging the screen further?