so I put fresh corn cob media in my tumblers the other day (Two Midways, one old style, one new and a Dillon). Normally the Dillon is the preclean, and the two Midways do the final polish. However this time the cases will not come out shiny. They are clean, but not sparkly like I normally get them. Is it possible to much Flitz Brass Polisher could cause that to happen? the media turned dark pretty quick. which it normally doesn't. These cases had been washed previous to hitting the fresh media in the Dillon, and then going into the Midways. I've dumped it all out into a spare pail, and I'm trying just straight corn cob, no polish, to see if the cases get shiny. I won't know till later tonight if it works.