I looked into having my axle zinc plated & found only one local shop. The guy told me they didn't do it anymore due to epa regulations here in Oregon. The other places I found I would have to ship my axle to, making it more costly because of shipping heavy parts. You might get lucky & have a shop local to you that can do it. Search the web for zinc plating in your area & that should get you started. Also the factory coating is zinc dichromate, the dichromate is what gives it that gold color, regular zinc is silver. Adding the dichromate over the zinc gives it better corrosion resistance.