Thanks, SultansOfSwing. I'm always looking for advice on how people clean up some of the more challenging pieces.Carefully inspected both for what patina was underneath the crud. The artillery had the solid green patina so I used a buffing wheel to slowly remove a few thousands of crud at a time. Then rolled a peroxide swabbed. Then tooth picks. Alternating those. Then finished with ren wax. The militia was a bit more toasty. That was water and tooth brush with a dip in CLR to show any remaining gilt. Then baking soda to neutralize and a water rinse.