1. Can anyone tell me what they are called? - Edge silvered glazing or whatever?

2. Can anybody tell me where I could buy them from?
3. is it acceptable to mount the art onto the front of a mirror, then put a spacer between the mirror and a sheet of glass? - I think this might look a little bit messy, but would welcome your comments.
Also, I am looking for some nice fittings for a large modern opening memorabilia frame (hinges, clasps & hanging hardware) in a silver, aluminium and/or black finish.
1. Any ideas where I could source these from?
2. If not, any advice on best method and material to paint standard ones?
Many thanks in advance.