Sand casting and lost wax molding

[AngryRob]

For iron, steel, and aluminum age alloy stuff, i propose a sand casting system. this would be giant molds that we carve using sand, and then pour large amounts of metal in to create advanced metal parts. i also propose lost wax molds, where we sculpt a shape out of wax, put the wax in clay, bake the clay, then pour hot metal in the mold to melt the wax and get a sculpted item. 

 

I can see these concepts as a great way to make improved tool items for mid and late game.