Applying coatings to substrates, namely, steel, finished parts, material webs, tools and machine parts of metal; applying layers of metallic materials as well as composite materials, in particular zinc, aluminum and alloys of zinc and/or aluminum; rental of mobile systems for wire flame spraying and for twin-wire electric arc spraying using wire flame spray guns, electric arc spray guns as well as associated apparatus, namely, transport cart, wire control unit, oxygen and fuel gas regulators,...