I have literally had my R320 a few weeks and it is now scratching if you go near it it seems.
First I noticed it on the screens, then when I went to wipe the lid over with a anti static wipe I found that scratched to hell too!
They are the fine scratches you only tend to notice in light.
Worth a exchange? Or are they all going to end up like this as if they are I’m finding another printer :Z