I tumbled some .223 with stainless pins that I got and came out with fantastic results: It started it's life like this: Now two days later it's all tarnished and looking like I originally did a half-arsed job. Need to protect brass after cleaning so it actually looks like I gave a damn the first time. Suggestions? It's tarnishing quickly to the point where it's like brass I would buy from somebody who had it sitting in their garage for a year in a bag. Here was my original process: 1: tumble in walnut to "clean" and remove crap I didn't want in dies. 2: Lube, size, decap 3: tumble in stainless media pins to completely clean lube and polish to a shine.. (looked fantastic as you can see in the photo) I will add that I had Dawn dish soap and some Lemishine in with the tumbling 4: trim, ----- look at tarnishing cases... repeat #1 & 3 until I'm tired of it? Maybe I need to glove myself when handling this brass? I'm clueless right now. Thanks in advance for the seasoned knowledge and willingness to help out.