Sparing the story, I've got a few pieces of primed yet unloaded brass. These pieces have been sitting for awhile and a bit tarnished. I prefer to only put nice clean brass in my actions, probably more to relieve my ballistic OCD than anything else. So I thought about tumbling these pieces for awhile to clean them up. But I don't know, seems maybe that's a bad idea with the tumbling media / dust getting into the primer and not giving good ignition. I'm using crushed walnut shells for media. Your thoughts?