A system comprising: an atomizing spray nozzle device (110, 510) comprising: plural inlets (518, 520) disposed at a first end of the device (110, 510) along a center axis of the device, the inlets (518, 520) configured to receive different phases of materials used to form a coating; an atomizing zone housing portion fluidly coupled with the inlets (518, 520) and disposed along the center axis of the device (110,510), the atomizing zone housing configured to receive the different phases of the materials from the inlets (518, 520), the atomizing zone housing shaped to mix the different phases of the materials into a mixed phase slurry; a plenum housing portion fluidly coupled with the atomizing housing portion along the center axis of the device (110, 510), the plenum housing portion including an interior plenum chamber that is elongated along the center axis of the device, the interior plenum chamber configured to receive the mixed phase slurry from the atomizing zone; one or more delivery nozzles (526, 528, 530) fluidly coupled with the interior plenum chamber, the one or more delivery nozzles (526, 528, 530) providing one or more outlets from which the mixed phase slurry is delivered onto one or more surfaces of a target object as a coating on the target object; and characterized in that the system further comprises an equipment controller configured to control rotation of a turbine engine into which the atomizing spray nozzle device is inserted during spraying of the mixed phase slurry by the atomizing spray nozzle device into the turbine engine, wherein the equipment controller is configured to rotate the turbine engine at a no more than one hundred revolutions per minute prior to commencement of spraying of the mixed phase slurry and wherein the turbine engine is rotated to speed up curing of the coating. an atomizing spray nozzle device (110, 510) comprising: plural inlets (518, 520) disposed at a first end of the device (110, 510) along a center axis of the device, the inlets (518, 520) configured to receive different phases of materials used to form a coating; an atomizing zone housing portion fluidly coupled with the inlets (518, 520) and disposed along the center axis of the device (110,510), the atomizing zone housing configured to receive the different phases of the materials from the inlets (518, 520), the atomizing zone housing shaped to mix the different phases of the materials into a mixed phase slurry; a plenum housing portion fluidly coupled with the atomizing housing portion along the center axis of the device (110, 510), the plenum housing portion including an interior plenum chamber that is elongated along the center axis of the device, the interior plenum chamber configured to receive the mixed phase slurry from the atomizing zone; one or more delivery nozzles (526, 528, 530) fluidly coupled with the interior plenum chamber, the one or more delivery nozzles (526, 528, 530) providing one or more outlets from which the mixed phase slurry is delivered onto one or more surfaces of a target object as a coating on the target object; and characterized in that the system further comprises plural inlets (518, 520) disposed at a first end of the device (110, 510) along a center axis of the device, the inlets (518, 520) configured to receive different phases of materials used to form a coating; an atomizing zone housing portion fluidly coupled with the inlets (518, 520) and disposed along the center axis of the device (110,510), the atomizing zone housing configured to receive the different phases of the materials from the inlets (518, 520), the atomizing zone housing shaped to mix the different phases of the materials into a mixed phase slurry; a plenum housing portion fluidly coupled with the atomizing housing portion along the center axis of the device (110, 510), the plenum housing portion including an interior plenum chamber that is elongated along the center axis of the device, the interior plenum chamber configured to receive the mixed phase slurry from the atomizing zone; one or more delivery nozzles (526, 528, 530) fluidly coupled with the interior plenum chamber, the one or more delivery nozzles (526, 528, 530) providing one or more outlets from which the mixed phase slurry is delivered onto one or more surfaces of a target object as a coating on the target object; and characterized in that the system further comprises an equipment controller configured to control rotation of a turbine engine into which the atomizing spray nozzle device is inserted during spraying of the mixed phase slurry by the atomizing spray nozzle device into the turbine engine, wherein the equipment controller is configured to rotate the turbine engine at a no more than one hundred revolutions per minute prior to commencement of spraying of the mixed phase slurry and wherein the turbine engine is rotated to speed up curing of the coating.