When I run pieces with open space in any mass finishing process,
abrasive or steel, I fill the inside with a bit of mesh - like from a
bag of limes or just mesh fabric. I really shove the mesh inside, and
leave a little tail, about 1/2 inch long sticking out. When I'm done
with the mass finishing, I use a chain nose pliers to pull the mesh
out. It's a bit time consuming to do but it beats the alternative of
trying to remove the bits of media later. I use this mesh stuff on
spiculums, the swiss cheese beads and pretty much anything that looks
like it would get stuff stuck inside.
Judy Hoch, G.G.