Cleaning large plated silver pieces. With lots of intricate onlays.

Plain white toothpaste and a toothbrush

A good thing for this type of job is what I use on all of my silver - toothpaste and a toothbrush.

Don't use the home made silver cleaners other than plain white toothpaste or silver polish on plate. It isn't thick and will probably get damaged.

Clean it in the bathtub.

I sell a lot of silver on Ebay. Jewelry, silverware, serving sets. Silver polish and dips tend to remove some of the metal like Tarn-X. The foil method doesn't work that great and still leaves a grey film that still needs to be removed. I use white toothpaste (not gel)and a damp toothbrush. For large items I use a damp cloth. Also works on copper, brass, gold, porcelain, sneakers, etc. For my sales I needed one product for cleaning everything.

I woud use TarnX and a soft toothbrush.