Maybe I don't know how to use the buttons, but I don't see a photo. Not sure if you're looking for brass or bullets.

If you have a stainless steel pin tumbler, it can be used to forgive many sins. Will remove tarnish and even light corrosion from both brass or bullets, but the tumble time may be 4 to 24 hours (check every 4 hours), depending on the amount of corrosion.

Don't do it if the brass has been weakened by significant amounts of corrosion, or if bullets are out of round, unless you can resize them.

Extended tumble times (such as > 12 hours) will begin to leach the zinc out of the brass, and your brass will come out reddish-pink, due to the now-higher % of copper remaining in the case.