Nufinish or turtle wax and make 50% of your media 20/40 corncob. This will make things very shinny. If you are willing to wait another 20 years or so I will be able to give you some good information about the long run. This is providing I'm not dead and there isn't a great long ammo drought where I am forced to shoot all my ammo.
When I start using a new batch of media the first time I only put in the Dillon polish. The next batch gets the car wax. After that everyother batch or so I put just a little additional wax to the mix. When it won't clean very well any more it all starts over with new media. I clean over 4000 rounds before the media gets replaced.