To re-plate you would need to acid wash the razor and then use an electro-less nickel plating, thats where the nickel (or whatever metal)is held in solution, you can buy a kit for about 120.00.
as with most plating the prep work is where the devil resides- if its not smooth and shinny when you start to plate it will not be any better when you are done. I have fooled with this over the years and the PITA factor is fairly high.