It seems to me that the walnut does a better job with very dirty cases, maybe it is more abrasive. and the corncob gives a finer smoother polish. I usually run fired cases through a quick ( 1 hour ) polish with the walnut before depriming in order to take off any big chunks then follow with corncob for 3-4 hours to remove case lube and polish the brass to a new finish. I also use lyman recharger with my corncob media.

maybe labor intensive, but I like to set it up to run while i'm gone. Don't care for the noise. The idea of a timer is a good one.

My brass seems to dull after being reloaded. Is this corrision due to handling? Or am I letting them sit on the shelf for to long (unfortunately true). Does anyone know of a product that "seals" the finished product to keep that "new" look? I take a lot of pride in this and would like shiny shells at the range and dog towns instead of dull.