LCD pressure marks - what they are and how to fix

Best discription I can come up with is a 'polishing-off' of the anti-glare coating
"...due to contact with the keyboard ..." and it is on the surface of the screen,
not affecting the pixels, but since it is a removal of material, no removal of
the marks would be practile.

Keyboard should never contact screen, there are usually rubber bumpers on screen
lid to prevent contact, D800 has eight of them and LM has none, but no screen/keyboard
contact has ever occured.

Most likely cause woul be a too tight packing for travel, with great pressure on
closed lid to cause contact, prevention would be to avoid packing that tight, as
well as checking 'bumpers' and posssibly adding more and thicker bumpers.

I would Google Search for some sort of antiglare coating that might be applied
to replace what is gone, this would need to be done with great care to look
better than it does now.

This is my first post! lol, anyway, ive used several Dell laptops in the past, and have seen this on a few more used ones. I think it is mostly because people sit things on top of them or travel a lot where it jitters around, easist thing to do is use some of that VERY SOFT packing foam that usually the laptops are packaged with strait from dell. I took a few from new laptops and cut a piece to fit my C840 15.1" lcd perfect, it didnt touch from the beginning but just from being in the bag i dont want any of those marks ever on the screen, theyre basically very fine rub marks from the hard keys.  You can take care of the laptop great and still get this. Most newer screens though like the D series D600/800+ have a stronger/sturdy lid that prohibits more contact than the older models.  It is annoying to look at.

Thanks for the comments.

Anyone else have any further suggestions, particularly about the antiglare coating and if it is possible to repair it in any way.