In general, I have no problem if you want to experiment on melting down in-house scrap soda cans.
That said, I would say melting down HAAS scrap or other materials with unknown/excessive contaminants
is ok only if you use your own crucible, and not one of the 3 DMS owned ones. I intended each of the DMS
crucibles to be dedicated to one metal each (brass, bronze, and aluminum). It’s only $15/$30 for a
small/large crucible from the vendor we got the DMS ones from: http://foundry101.com/learlink1.htm
All IMO, of course, but I consider it a understandable request that experimentation that can damage DMS
equipment be done on personally owned gear whenever reasonably possible. Since crucibles aren’t that
expensive, I think that this should be an acceptable workaround.