I'd be interested in what "burnishing liquid", "soap" or
"detergent" Orchid members would recommend for a rotary tumbler
with steel shot to be used to work harden PMC objects?
Sunsheen burnishing fluid works well, as does water and a drop of
dish soap. A big source of problems can be in the water–if your tap
water has a high mineral content, you may want to go to filtered,
bottled, or distilled water. This is most important if you intend to
add a patina after tumbling.
Mary Ellin D’Agostino, PhD
Sr. Teacher, PMC Connection
Certified Artisan, PMC Guild