Why don't you drop some mixed scrap of the metals that you use into
different mixtures and see what works the best with the least harm?
Tarnex silverware cleaner will work on the silver, copper and brass
and I suspect that it will not hurt the anodized aluminum. I think
that the most dangerous thing to do to the anodized aluminum would be
to use anything that would scratch the surface. Have you considered
using Renaissance Wax on all of the parts? Marilyn Smith