I think the scars show it's age and gives it a unique character. Embedded unknown history. If there's any really rough spots or burrs I will remove them though.As cold as it is here today, if I found that I'd say there was a brass monkey which was missing something. Downside for me is that spring= the return of allergy season.
It should make a fine handle, Valky. Do you plan on smoothing out the scars or leave them as part of the knob's "story"?