Make Metal Parts with a 3D Printer (lost polymer casting tutorial)

lost polymer casting is one of my favorite activities. the ability to design and make metal parts is intriguing... i may not have completely mastered it yet, but i've learned a lot of painful lessons, and i've developed a method that should help you get started. in answer to numerous questions, the electric melting pot i use is a Do-It Molds Hot Pot-2:
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