Plasma-sprayed coatings of Ni-18.5Cr-6Al, molybdenum, and A1-12Si are used in selected applica-tions for dimensional restoration of jet engine hardware. These coatings are usually limited, how-ever, by the thickness to which they can be applied. In order to increase the coating thickness capability of these materials, the dual-wire electric arc process was investigated. This paper presents the results of a testing program to characterize the bond strengths, microstructure, hardness, and surface roughness of these three types of materials using a standard dual-wire electric arc spray sys-tem and a high-velocity (arc jet) spray gun. A comparison of bond strengths and microstructure to typical equivalent (in composition) plasma spray coatings was also made. The test program was de-signed to emulate, as closely as possible, substrate materials, spray application procedures, and coat-ing thicknesses that would be used in service.