The plating kit, I got from Caswell....and it wasn't cheap....all up, it cost me around $1,300 to set it up, but I see it as worth it since I can determine how much zinc I want to put on the articles, and not rely on a business to do it.....besides, there isn't anybody within several hundred miles to do it anyway.
I'm still learning with it, but I have the basics fairly down pat.
Check out some vids on youtube....should be plenty on the subject.