One member here, Chromeboy, had a JS2000 nickel plated... you could ask him for pics.
They do it over top of the existing finish, which might make it more durable than trying it on a raw wood body, but only time will tell. Every minuscule flaw in the existing finish gets amplified about 10x in the process, though... even if it's a "flawless" brand-new factory finish, it will show flaws that you couldn't perceive with the naked eye. Apparently it does also add about 3 lbs. to the weight of the guitar. That's a lotta metal! And i'm sure it would affect the tone.