This will probably work on any plastic hopper I bet
So, I've got discolored powder hoppers as many of you have and I have thought about replacing them with the glass ones, however I'm cheap sometimes. So I found myself reasoning. why not mess with one first and see if I can improve things. I'm going to order new ones anyway so - nothing to lose right? So I dug around in the garage and pulled out some clear coat polish that I've used to clean yellowed headlights. Let's see how it works on the Dillon hopper.. In short. It worked way better than expected.
here's to start
These were both actually pretty bad. the one on the left originally had that orange/brown staining. In the back is a fairly new one for comparison.
so here's the stuff I used.
I used a vacuum extension and a sock with a liberal amount of the polish applied
A few minutes of polishing and then wiping things out really good with a clean towel, and this was the result!
I was pretty satisfied with the outcome. I likely added some static to the tubes, but a few minutes with some old dryer sheets should solve any issues created there.