I looked, online, at 3m Vikuiti screen protector, which can be bought quite readily. I haven't tried it yet, but as I was looking pre-receiving my 600, my thoughts were to buy a larger sheet and cut to size, while keeping the rest as a spare.
Edit: I have found a youtube video about it at
www.youtube.com/watch?v=Eai9KzZiV6M . The sound is in German, but it is self explanatory.