Supersonic jet, setting it apart from conventional flame sprayThe speed of particle impact on the substrate is much higher, resulting in improved coating characteristics.Fuel gases of propane, propylene, acetylene, hydrogen and natural gas can be used, as well as liquid fuels such as kerosene. properties of a coating, such as increased chemical resistance, increased abrasion, and impact resistance. The body coat or intermediate coat must also provide strong adhesion to the primer, as well as a good base for the topcoats.