This one has me stummped , the only thing that I can think of is that there is something else in the mix , by that I mean some other metal , can't see zink causing this .
What other metals could melt in that temp range and still return to a solid without being noticed ? Any ideas ?
I think I'm going to take a couple over to the chem plant and have a buddy in the lab run them to see just what their made of .
stimpy