An additive manufactured part is formed as a solid body of material including additive manufacturing powder, binder material supporting the powder in the shape of the solid body, and strengthening resin infused within the solid body. The additive manufacturing powder can be sand. The infused resin can be a two-part resin wherein an inert gas is added to the mixture of the two parts of the two-part resin during mixing. The infused resin can be infused inwardly from the peripheral surface of the solid body and can penetrate partially or fully through the thickness of the solid body.