It's a replacement screen from the look. Marks would include thin gray band. Other marks could be fingerprints or dust....maybe air bubbles.
Air bubbles with a tiny dot in the center indicate a dust particle. Peel screen back and lift dust off with adhesive tape.
Warm one of the corners with a hot rag and use a fingernail (nothing else) to get under it.
I lifted a couple completely off and washed them in water and a drop of dish soap with usually terrible results.
When installing new screen do it in the loo with the shower running (steam keeps most dust settled)
Good replacements come with instructions. The shower is not mentioned.

techtuff in Canada may have a good quality replacement. Tell him I sent you. (He, Andre, is available PM on NBR) I checked on ebay and he shows none. Google (techtuff touch panels)(several cute things in his ebay store)
I see you are online...I'm talking to Andre (sending a PM) now. I'll ask him. If I don't get back to this by Tuesday drop me a PM.
_________________
Fair for you/ Fair for me.
I chose to NOT be organized. -------------------------------------------------------------------[/color]
http://toughbooktalk.com/http://forum.notebookreview.com/panasonic/