really nothing you can do to "repair" it.
maybe cover the scratch with some non-conductive heat resistant enamel or paint.
but unless it is something that is very noticeable and a constant bother to look at for you, i wouldn't worry about it.
If it was a car, you scratched the clear coat on the paint job. From the looks of it you didn't even make it into the second coat, never mind the paint underneath.
Definitely looks superficial, cosmetic only. It's not on a high heat area, a little dab of clear nail polish would work if it bothers you that much, but honestly I don't see the need for anything more.