Excited to finally have a tumbling setup at our workshop and get some nice finished on our pieces! We are currently using a vibratory tumbler with 2 types of plastic media inside followed by a rotary tumbler with 2 types of stainless steel shot inside. Most of our pieces are coming out looking great, however with certain style where we have soldered two pieces of brass together or a wire on top of sheet, a line is appearing around the boundary where the two meet. (see picture to understand much more clearly than my explanation).
I’m guessing the line are due to one of the media not touching that area therefore not finishing it properly. If that is true, what shape media does anyone suggest to get in there and do the job? I have heard that people veer away from pins in their steel shot as it can result in an orange peel look, but i’m open to trying things out.
Thanks for any advice you can offer!