Yeh you can change the top screen plastic by heating it up and peeling it off. a replacement can be bought here http://www.ebay.co.uk/itm/New-Replacement-Plastic-Top-Front-LCD-Screen-Frame-Lens-Cover-For-Nintendo-3DS-/221906328905?hash=item33aaa5dd49:g:rRsAAOSwunJWFAVI
It sounds strange to have...