I regularly tumble my enameled pieces. If there is bare metal in
them- as in plique-a-jour- it gives it a nice finish without
affecting the enamel.
But- I am generally not using enamel just in accents. I’d happen
after it’s been purchased!
I’m not really convinced the tumbler does much to work-harden the
bulk of the metal anyway- it’s a pretty gentle process. It does
work-harden the immediate surfaces, though, as well as giving them a