I thought I had responded to your sanding comments- maybe with this being reposted its been deleted.
Wet sanding should not create any dust at all. I use automotive suppliers wet sand paper as it gives the smoothest finish.
Half fill a bucket with water and I put all the jewellery needing sanding in there. Work on one at a time underwater = no dust!
Its a very fast process so doesnt add much to the making process, they end up smooth as glass.
I find over time they can become marked when worn often, but I just wash mine in soapy water with a soft brush and also advise buyers the same.
hope this helps Lyn