Does anyone clean the outside of their case necks before they tumble them? It's something I've always done but don't see anyone else make mention of.
I use Nevrdull which is a metal polish that comes on cotton wadding to wipe off the burnt powder on my necks and then wipe off the residue with a cloth before chucking them in the tumbler.
Anyone doing something similar, or have a different method or if you don't do it, does the tumbler remove the fouling on it's own?