What do the experts say?

[C.O.B.]

Leave it alone.

[Bill Murphy]

I have had good success with scrubbing the bores with oil wet emery cloth. Be careful of the sharp edge at the muzzle and breech. Don't round off the rim recesses.

[Chris T.]

Don't let a few pitts bother you, your better off with the max wall thickness. I don't think I have ever owned a Parker that hasn't had some pitting. The bores may look great, but once you give them a good scrubbing with a bronze brush a few times your bound to find some secrets.