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I simply cannot believe that is the same brass I sent you.
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I have to admit I was a bit surprised when I opened up the tumbler this morning. I figured the fresh solution would make a difference, but I wasn't expecting that much of a change.
I've got about 20 ounces of your nasty brass left - I'm curious to see how it does with two hours of tumbling, swapping out the solution and then tumbling it for two hours more. I'd like to find the "sweet spot" for tumbling time so that the cruddy brass comes out looking good, but doesn't have to spend forever in the tumbler to get there.
Considering that the results after four, eight and twelve hours in the same solution weren't dramatically different, I'm suspecting that the soap and acid were 'used up' pretty early in the first four hours.