Some of this boils down to personal preference, but I've been using vib cleaning for 30+ years and never had a problem getting clean and polished brass. Sometime the brass does not shine like new, but generally it does. To me, clean is the most important. My process is simple, throw the fired brass I the vib for a few hours and be done. Back in the 60's-70's I tried various methods of washing, drying, special chemicals, soap, etc. Then I made my own rotating tumbler using walnut shells and mineral spirits (to keep the dust down). Finally I went to the vib cleaner with corn cob (the 2040 grade, see above) and some polish, best method for me.