http://www.alumilite.com/ has allot of good information that may help you
granted the total cost to set up can be a little on the expensive side if
you go with all of there products and accesories. Instead of using their
silicon mold making material i use the copper silicon gasket material from
the auto parts store and i use a slightly modified old preasure cooker with
my air compressor for getting bubbles out of transparent castings