First Lost-Foam Casting

[Hopefuldave]

That makes sense - I have a few parts I'd like to cast with some thin sections linking quite heavy ones, so I think it'll mean a trip out for burgers... Might give the melt-out a try, as at least one (about 8 pounds of aluminium) will need a runner and gates to get a good fill..

As I have a half-bucket of silica gel, I'm going to try some home chemistry and the silicate/sand mix, can pipe some Mig gas through to cure it.

A rude question, I know, but any tips on budget refractories for furnace linings?

Dave H. (the other one)