Interesting.Nickel coating would help prevent oxidation, which is what would cause electrical issues. I have no idea if the process is feasible. You would need to come up with a long, narrow tub for the pieces to sit in while the plating process does its thing. I also have no idea if it would damage the plastic ties. There are 2 types of nickel plating. One involves anodes, cathodes and an electrolyte solution that contains nickel. The other is called electroless nickel plating. I really don't know much about the process other than you end up with a thin layer of nickel that coats the steel.
I will ask one of the science teachers.
If it’s feasible and I do it, I will post a how to.