Cleaning brass

[swpc629]

I have some nickel brass that I got from someone else. I am pretty sure that he cleaned in an ultrasonic cleaner because it is black, and that is all he has to clean brass with.. I have tried tumbling it with stainless steel pins. The stainless takes off some of the black but it takes tumbling it 4 or 5 times before it starts any noticeable effect. Does anyone know of another way to get the black off and the nickel back to silver?

 

[Lefty7mmstw]

good old walnut will probably do it.... buzz those suckers a night or two in a tumbler and see. I've had nickel watermark and a couple of hours will take most of it off using walnut. Any chemical staining may be deep enough that it won't come off.