Hey! I知 relatively new so sorry if this doesn稚 make much sense! I have recently bought a barrel tumbler for my sterling silver cabochon rings, when I take them out there are white bits around all the joins, in particular where the ring band connects to the back plate. Should I be doing something pre-tumble that I知 not?

Also, I got the Dremel polishing starter kit but none of the attachments will reach the really awkward places, is there another attachment I can use that will reach them? (I知 also thinking for when I patina the pieces, an attachment that could really get in there and get all the patina off).

I was also wondering what technique people use to get patina really black, as mines not seeming to go past grey.

Many thanks!