I tore down the top side of my Harlem Globetrotters and threw all of the metal parts in the tumbler. Last night it had been running for about 48 hours and I took a look at the parts. The hardware is not shining up much if any at all but all of the other metal parts look great! I'm using walnut shell media and added some Flitz to it before I started the tumbling process.
So, my question is, is there a plating on the hardware that is gone and no amount of polishing will make it shiny again or maybe am I using the wrong type of media?