On Sun, 07 Oct 2007 15:56:03 GMT, "Ivan Vegvary"
wrote:

Thanks everybody for encouraging me to take my scrap aluminum siding to the
metal scrap dealer (instead of my wife's kiln). I also have been saving
aluminum window frames, screen door frames and ladders. Are these also not
ideal for foundry work? Should I throw them on the truck?

Thanks again,

Ivan Vegvary


you can melt the aluminium but the anodising remains as a hard crust
that must be dredged out of the crucible or the casting will be
ruined.
the anodising has amazing strength.

Stealth Pilot