A key enabler for fine scale 3D Manufacturing of metal parts is access to inexpensive sub-micron metal particles, not achieved via current technologies such as atomization. We demonstrated a novel means to directly reduce sub-micron metal particles to metal at <700 C using inexpensive reductants. Specifically, wax or low-grade coal, both with and without catalysts, were placed immediately below beds of sub-micron scale oxide particles, NiO or Fe3O4, easily made by grinding, and then heated in an inert gas (e.g. N2) to ~650 C for <10 minutes . X-ray diffraction and scanning electron microscopy analysis showed, in support of the hypothesis, that nickel oxide reduced fully, but iron only partially. These results suggest solid hydrocarbon assisted reduction (SHAR) could be developed as a means to make sub-micron particles suitable in terms of price and quality for use in particle injection molding and 3D manufacturing of precision metal parts.