I saw a very good low buck trick here on Fabo,for cleaning up rusted shiny emblems and lug nuts etc. Clean em up with sos pads,then a bath in vinegar neutralizes the rust. Quick coat of clear after touch up's would keep the rust out.
Im kinda lazy and tend to throw shiny bit's in my vibratory tumbler which has corn husk media. It all comes out looking brand new,whatever I put in it. Just dont reuse the media for your gun brass (cross contamination doesnt happen just in the kitchen)