shabby tarnished brass and solid copper trays, vintage round tray lot

Lot of three vintage round trays, one solid brass and two solid copper, all very spotted with tarnish. These are 12" to 12 1/2" in diameter.

One of the brass trays has a monogram letter G at the center, and the brass tray has ornate 'brocade' pattern. We haven't touched them with polish, but believe a good polishing and buffing would probably help the tarnish, and the fine surface scratching from years of use.