I only use a cleaner like the Swest one you suggested for pieces
that are Silver with no porous stones like Turquoise, opals, etc. these
solutions can be very damaging to many stones ,
The paste creams I suggested is a safer way and you get a nicer
shine to it, of course ultimately buffing it on the polisher gives the
best finish but this is not always possible on intricate pieces such as
the Squash Blossom Necklace. Sincerely Chris Cool & sunny in CT.