cleaning nickel "brass"

[mikeyr]

I was looking for some 357 brass and remembered that 35+/- years ago I used to have quite a bit of it before I went to 9mm. I found it in the back of the garage in paper bags that have gotten wet over the decades. Probably 1,500 .38spl and another 350-400 of 357. All nickel plated stuff, but because the bags got wet there is some corrosion on them, nothing serious, it will still shoot

How do I clean it ? just put it in the vibratory with walnut shells ? I searched and read that i can't leave it in there with walnut shells too long or it will remove the plating, so is there a better way to clean it. Its pretty weird some cases look brand new and some have slight corrosion on them but were stored exactly the same way. I sorted out the worst of them yesterday and will throw them away. Wish it had been the other way around with more 357 then 38

[mark501w]

I just tumble it . Supposedly the mickle can be tuff on your dies I haven't found that to be true so far.

[maxx03]

Wet tumble, then tumble in walnut for 1 1/2 hr. Brass comes out smooth. If left in walnut too long plating will start to wear off.

[Cowboy T]

I do a 50/50 mix of walnut and corn cob for about 3 hours. Yellow brass cases come out nice 'n' shiny. Nickel-plated cases come out looking like brand new.