I have found alot of old winchester brass at a yard sale. I bought about 300 brass for $12.00 alot of the brass is new as was still in unopened bag. But some of it is tarnished, like greenish looking color. I do not have a tumbler yet is there anyway of saving this brass. There are about 75 of them are like this they are in excellent shape,just have been put up for a long time.Thank you