I use 18 karat gold beads from India in my work, which have this
really great matte finish. But all of the 18 karat chain and wire
that is commercially available has a very shiny finish, which does
not match those beads. Any tips on how to give the wire and chain a
matte finish, without painstakingly rubbing it with a glass brush or
sandblasting it? Or, failing that, any tips on goldsmiths or
refiners who would custom-create matte wire and chain for me?