Like most of us, [Clem] wants to 3D print in metal ... used as a step to make a part conductive so you can then plate with another metal. In addition to copper sulfate, you can use copper acetate.

Forging, welding, milling, grinding; anything to remove metal or push it around ... grooves on both sides of the steel plate. His solution was to 3D print a couple of sacrificial guide blocks ...