Hi, Ben.  
I'm back at it trying to finish my iris setup and a private Nostr Relay.  
Regarding your iPad screen scratch, I did the following search via Google, w/o the quotes.
You might want to do something similar via SearXNG?

"diy fix fluid for iPad screen scratch"

It returned several YouTube offerings.
Don't know if you've already reviewed them?
I hope it helps.
kagronostr