Additive Metal printers are very expensive to buy and operate. £10 000+ is your starting point.

You can print metal infused PLA using a £300 printer. This has 15%-85% metal powder, but can be printed at 200C. You cannot really polish it to a bright sheen, but it can look very nice for antique finish items.

For high quality small items, you will need to spend more, may be £5000, which will get you a printer with good resolution and accuracy. This will print down to 0.01mm as opposed to 0.1mm for a hobby type machine.