The metallurgical composition of a machine surface may be determined. Based on the composition of the surface layer and its substrate materials, a mixture of pure metal nanoparticles, each coated with a monomolecular organic layer adsorbed on its surface can be mixed with catalysts, reaction initiators, and/or other necessary ingredients for the repair action of the machine surface, depending on the specific machine, operational type, and/or the nature of the damage. The nanoparticles are applied to the machine surface, the organic monolayer wears away from the nanoparticles under shear stresses and the nanoparticles adhere to the machine surface to form a repair layer on the machine surface, thereby providing a repaired surface.