It may be possible for to attempt to repair this, as we had good success with demo/repair units that came back with damage displays.
We used a clear lacquer from RS part number 569 307, however this has been discontinued and they have recommended 136-8535 as a replacement (link at bottom of page), Obvously i have not tried this one myself.
As Ian mention you do need to remove all of the top layer of the damage display first. Once this has been done use electrical tape to mask the area off, have found any other tape can interact with the lacquer and leave stick mess on the desk front panel.
Make sure the desk is then on a level surface then apply a single coat of the spray. Wait a few minuets then remove the electrical tape. Allow the lacquer to dry in a warm dust free environment for a few hours.
https://uk.rs-online.com/web/p/electronics-varnishes/1368535?searchId=b9aa3e9e-1bf3-4f21-ba99-5afabb957a9b&gb=s