How to get rid of a nail file scratch mark on my iPhone 5 home button?

It was very foolish of me to use a nail file to "buff" out this nail glue mark I have on my home button. Now both small scratch marks and a tiny glue mark are there. How do I get rid of this?

I suggest you stop attacking your phone with foreign objects and substances, and count yourself lucky you haven't done more damage.

If the glass is scratched, you're done. I could make all kinds of recommendations for buffing and polishing, but I think you should leave well enough alone.