I did not watch the show, I do not waste time cleaning 'really old dirty brass' I cut tumbling down to one hour maximum, I clean with vinegar for a max amount of 15 minutes and that can be reduced.
Then for a short run as when loading 20 rounds, I clean 20 cases in less time than it takes to tumble, results? Like new, but, I did not see the program and you did not give a clue as to his method, cleaning the worst of cases with patina using vinegar can reduce tumbling by days.
F. Guffey