I bought a beater Deep Blue watch from thegoat about 3 or 4 months ago and by beater I mean really beaten, I don't think he will mind me saying that as I knew what I was getting and it was to be beaten some more. I valet car's so wanted something used that I wouldn't mind getting bumped and scraped.
Fast forward to today and I had ordered some diamond paste as a tester because the crystal was dull with plenty of mark's and scratches, I didn't really expect it to work but seriously it's amazing stuff.
I did use a small battery operated rotary tool to do it with. So here is some before and after pictures.
The before doesn't really show how bad it was but you can see the circular scratch that stood out the most.
The stuff I used is called Scratch Genie and no I don't have any affiliation with it, I just think it's amazing and wanted to share with anyone who wants to remove a scratch from their sapphire crystal.
Sent from a technical device.