Okay, @potty dollar 1878 said that this can be achieved the easy way at home, I guess.. At first, I was like, Cooool! Then he sort of told me but it was Xmas so he didn't want to spoil it. So, now I would like to know how it was achieved. Thanks in advance!
Plated or De-plated.. Zinc has a Silvery Blue color. Definitely not steel if it does not stick to a magnet. Try it.