no it is not zamac that I'm looking for it is zama.  I need to find out the composition, as I want to see if I can have it nickle plated.  The items that I need to buy are made of zama according to the catalogue and website.
I guess a better way to ask the question would be, Does anyone know of any metal that can NOT be nickle plated?  I can't think of any, but there are likely to be exceptions.