If they're polished originally, polish 'em again.. If they were of a 'dull' finish, a proper bead blast will remedy any mark..
Mine are bead blasted (sako’s) so every so many years I jus touch them up.
The Sako’s use a REALLY fine (almost powder if it’s not powder) grain of glass beads.... that is if I want it to match the finish of the reciever perfectly..
But frankly any grain bead blast is so close no one notices...
I’m a bit on the accuracy OCD side so if it can be beyond perfect I will probably waste extra time trying to getting it there
the obvious way is to blast both the action & barrel will get you there anyway...