[NJARC] Pot Metal

[njarc@mailman.qth.net]

Regarding the pot metal, I've seen this happen to model trains from the 40's 
+/-.  From what I've been told, Zamac is a mixture of various metals.  It all 
depends on how well the mix is measured.  It starts out as checking like you 
see in wood, but then it tends to slowly explode.  There is no way to save 
the piece other than to make a casting of it before it gets too bad and 
create another one out of resin or some other material.

Thanks for the suggestions.
Joe