I could do a little polish, but it really isn’t all that noticeable unless the light and angle is right. Probably just leave it as is for now. I’ve repaired similar damage, but it was more pronounced.
Sometimes you just never know... I have a Remington Rolling Block in 50-70 (New York State Militia issue) with about a half inch of barrel pitting right at the crown of the muzzle. You’d think it would benefit from counterboring, but, as is, it shoots extremely accurate. So why mess with it?