I don't know if it's possible to crosspost, and I didn't notice (after an all-too-cursory look) any general device forums, so I posted my review of a screen protector for my 505 in the Sony forum.
I can't say I'm entirely thrilled, if you'd like to see me elaborate, please check it out here:
https://www.mobileread.com/forums/sho...570#post382570
photo included!