Shiney brass is like chrome......'over rated, after using real BP I stick 'em in a bag & might be up to 3 days before taken out , thrown in hot water with detergent powder & given a rough up, let sit for an hour, rinsed off, dried & then into a plastic container for when I get around to loading.
They are always clean with a tarnished black flavor...the way I like 'em.