Just received my parts back from Queen City Plating, Inc. and I can say it's the best Zinc plating I've ever seen. I sent them all my dirty nasty old hardware it came back factory perfect. It looks 100% factory original. It's not cheap of course but if you want your factory hardware restored I'd give them a call. It's called Zinc Type II With Irridite. Queen City Plating, Inc. 425-315-1992.