[Linked Image from i.imgur.com]

I have this beautiful antique kerosene lamp. When they moulded the lamp they left a little rim of glass going around the middle of the finger grip.
This little rim sticks up about 1/16 of an inch. It digs into your finger when you hold the lamp.
I am a carpenter not a glass worker I don't know how to fix it.

Is there some kind of round file that I can use to grind down this little rim?
I just tried my ceramic stick knife sharpener, it doesn't work.