As Al said, it ain't cheap nor common. But if its a rare/expensive thingy you want to (re) plate, you CAN do it yourself, with decent results. You first need to become familar with plating terms and in handling chemicals. There are two processes that will work in a home garage without electricity: electro-less nickel, and silver mirroring. Both rely on a decomposition of water-soluble chemicals to precipitate a shiny base metal onto any surface. A low- temp 'cure' in Mom's oven followed by a protective clear-coat spray completes the process with no polishing required. Browse to and input 'plating' or maybe 'electroless nickel' or 'silver mirroring' for more info.
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