Just an FYI - The cases have been porcelain media tumbled. For some reason this has made them darker…they are brand new never fired but they do look darker.
Thanks again for posting this and bringing it to my attention.
I was able to get the rest of the brass back to it’s shiny state. See pictures.
I tumbled them for an hour with stainless steel media and limeshine.
The picture is of the Alpha LRP brass (on the left) and new never cleaned Alpha SRP brass (on the right). The only real difference is the annealing mark on the new brass.