I aquired some 30 yrs ago a silversmiths drawbench. At the plate end
it was thick with tallow from 100 yrs use. I scraped it all off and
seperated out all the metal particles some 8 oz. From that pickling
it in dilute battery acid I recoverd some 4 oz of silver. seperated
Put you mix into a solution of flowers of sulphur, the silver will go
black, the ali wont.
Dry, put on some white paper and pick out the silver with tweezers.
Still worth doing on principle.