On Jun 21, 2004, at 11:34 PM, Ake Hedman wrote:
>
> I came across a relatively inexpensive rigid urethane from an outfit
> called GoldenWest (http://www.goldenwestmfg.com) -- lots of other
> outfits sell it too.

Lots of this sort of thing (two part urethane resins) exist;
"Alumilite" is the brand name product carried by many of the more
serious hobby stores.
Cheaper and broader products from places like http://www.bare-metal.com/
Most will foam if you add some water, although not in a particularly
controlled fashion.  Several product lines specifically include foams.
And assorted fillers.

Not a LOT cheaper than bulk epoxy resins, but faster and less viscous.

BillW

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