This type of application can be very challenging. Various types of wires made of 316 stainless steel, Monel® alloy, zinc, and other materials are fed into the spray gun two at a time. The wire spray gun is fed with a compressed air line. The compressed air blows through these wires as they cross, creating an arc that blasts the wire onto the roll to form the coating. The wire spray is very fine, mostly submicron particulate and is inconsistent in shape, causing a difficult challenge for the dust collector.
This published article can be very helpful if you have a similar application. Read the entire case study Dust Collection in Plasma and Wire Spray Operations.