Brass bolsters can be both easy and fun in refinishing them to your preference. I have an older 4-dot finger-grooved Buck 112 that originally came with scuffed & dinged bolsters. See the 1st photo below.
I cleaned up those scuffs and dings using a progression of wet/dry sandpaper and following that with polishing - both using a Dremel with a cotton wheel and some green compound and then following that with some hand buffing using Simichrome polish. See the next 2 photos below.
After some time, I began to realize the high-polished finish tended to show fingerprints pretty obviously, so I used a green Scotch-Brite pad to give the brass a nice satin finish, which conceals fingerprints very well. See the next 2 photos below, taken immediately after I did that.
Since then, the bolsters have acquired a nice patina over the satin finish, which still looks very good. I've now come to the realization that, if the bolsters get scuffed again, the green Scotch-Brite pad is my easiest and favorite method to clean them up.