I've had no problems with any Kindle ereader screen getting scratched.
"The glass covering the panel is strengthened Gorilla Glass, but in order to stop glare it has been micro-etched. The side effect of such a process, according to Amazon, is that the glass feels like paper."
http://www.geek.com/chips/amazon-ann...paper-1604744/
Gorilla glass?
http://chemistry.about.com/od/howthi...illa-Glass.htm