I have used the Nu Finish process when I was dry tumbling. I messed up the first time I used it because I didn’t allow mixing time before I added my brass. I had clumps of Polish and media inside the cases that had to be manually removed. That sucked like a straw factory.
How long do you allow the polish and MS to blend before adding the brass?
I add the Nu Finish and mineral spirits turn the tumbler on for 10 minutes then add the brass.