Casey, might be your method. If you get a customer that wants a fine finish, you need to start very slowly. With a just barely damp applicator rubbed on repeatedly.
I did a Ballard .22 with a new Douglas barrel that I had polished to 1000 grit this way. It did not finish with the same 1000 grit polish, but it was easily 600 grit equivalent, maybe better than that. The trick is to start slow. It will be very very even. I don't even use a humidity box. You may also be using a reagent that is just to aggressive.
Jim Westberg up in MSP showed me a Rigby Ballard he has built for a customer. He has a barrel that is easily the equal of 800 grit. It has a beautiful deep luster that just won't stop. I think he used Mark Lee's product but I can't be sure. Jim does beautiful work.
Brent