How do I smooth the sides of a spoon?

I had a teaspoon fall into the disposer of my kitchen sink – sadly, I turned on the disposer, heard some grinding, and immediately turned it off.

The sides of the bowl part of the spoon are nicked slightly where the disposer blades got into it. 98% of the spoon is just fine.

Is there a way to grind out the rough parts of the spoon? I’m not so worried about appearance, but more on smoothness and not snagging my lip on the side of the spoon.

Any adivce?

Stainless steel 18/20 I believe/