Marks on MacBook Pro Retina Screen
MacBook Pro with Retina display, macOS High Sierra (10.13.6)
MacBook Pro with Retina display, macOS High Sierra (10.13.6)
Did you try cleaning the screen, and top of keys?
If in doubt all you can do is take it in to get an official assessment and viable options to resolve. Not much you can do in an on line ASC.
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics and Assessment'
Genius reservation http://www.apple.com/retail/geniusbar/
on-line https://getsupport.apple.com/
check warranty https://checkcoverage.apple.com/
Marks on MacBook Pro Retina Screen