Bought my TL from a friend. Now I don't know how he managed to do this but, the Navi screen has a lot of scratches on it. Is there some sort of liquid I can rub into it, to fix this. Makes it difficult to see the screen during the daylight. Not a problem at night but, still it's annoying. Thanks for the help!!

 

Sounds like you might be out of luck...

 

I'd try some McGuire's plastic polish and a micro-fiber cloth. I'd use it very gently to start. You may be able to get it to be serviceable. I would take it very easy on the screen though.