This won't be something you can easily do outside a well equipped shop. Here's a bit of marketing lit about the process:
http://www.met-sol.com/assets/Indust...C_Brochure.pdf
As you can see from the pictures on the second page, the layer that results (ie, "the case" as we'd call it if you think of this as just a high-tech case hardening) is quite thin.