polishing the muzzle crown

After the last range trip 250 dr .

During feild striping and cleaning i felt a very small burr on the muzzle crown

After i ran a bore snake down the barrel the the burr was gone but i can see a veeerry small nick on the muzzle crown now .

i was thinking on buying a brownells muzzle polishing kit

is this a good idea or what .

ps

i was also conseduring buying jb bore bright bore polish

same: good idea or what , is fire lapping better

Thanks