@coach joe posted:"No experience, no knowledge(?), no control,...no care...," Quality control isn't just looking at one in a thousand of the finished product as it is slid into it's packaging, it should include materials making the parts that make the assemblies that are assembled in a proper fashion to provide a finished product free of blemishes and defects that functions as intended and designed. .
Themetallurgical knowledge, control, and, yes, concern BY THE CASTING ZINC SUPPLIER was exactly the point of my original comment. Of course there's no way to detect ZP in the finished product as it's boxed for its journey to your layout. Atlas undoubtedly has had a lot of experience in helping their sources control this at its most basic level...when their products were made within their direct control in the USofA. They have no such control in that land far, far away. It's up to their contracted supplier of the finished product to manage such issues. And, good luck with that for as much as we've learned about far, far away sourcing in a land controlled by government fiat.
It is what it is. And as the cartoon sez...
...including Zinc Pest.
