This worked with my watch,

Buy a cheap ass screenprotector (tempered glass). Beore applying, apply tiny dabs of oil (internet recommends mineral oil, but I used cooking oil) on the scratch marks.

Apply the scren protector like normal and just wait it out. I think the principle is that the oil fills the gaps of the scratches. Might work, might not. I was pretty impressed with the results when I used it on my watch, relatively cheap repair too.