The story:

Broke my old phone, my boss handed me a newer model out of the drawer, an
i90.  I like it. But the plastic on the interior display cover is all
scuffed up.  Some of the icons are hard to see.  Scratches are in the shape
of the buttons on the keypad.  I've seen new housings avalable online from
10 to 25 bucks.  I've got no Nextel repair stores around me.

Three (or four) questions:

Do these new (and colorful) housings include the interior display cover? The
photos seem to indicate no.

Will the buttons continue scratch up the display? i.e. Is this a common
problem with i90?

or should I try that "Displex" or similar scratch remover/cleaner?

Thanks for any suggestions.