The dominant advantages and shortages of gaseous detonation spraying (GDS) are discussed. The permanent efforts are directed to the achievement of the highest quality of coatings and productivity of GDS at lowest possible cost. This may be achieved:
Firstly:
·        by better understanding of patterns of relationship of DGS operation cycle;
·        by better understanding of gaseous detonation products interaction with processed powder;
·        by search of methods for powder particles behavior control at impulse jet;
·        by better understanding of impulse jet-substrate and particle-substrate interaction;
Secondly:

• by continuous improvement of process technology of DGS on basis of system approach and better understanding of materials interaction in process of coating formation;
  
• by full control of all parameters involved in the GDS;
  
• by adequate GDS process simulation and optimization of all working conditions;
  

Thirdly:

• by development of the fully adaptive systems for GDS and the process monitoring devices.
  

To date it are created manifold gaseous detonation guns (DG) which differ by mode of functioning (principle of operation) and embodiment. Therefore it is urgent question of estimation of technological capabilities, as advantages and shortages of different variants of DG and development of justified recommendations for their industrial application. For DG classification the next attributes are used: 1. types of fuel and oxidant; 2. typical mode of gas mixture burning; 3. type and design philosophy of barrel (configurations of transverse and longitudinal sections, microgeometry of barrel surface, type of cooling, attitude position); 4. type, location and operation mode of ignition generator; 5. technique of predetonation distance control; 6. peculiarities of gaseous exchange at barrel; 7. technique for gas mixture preparation and flow rate control; 8. initial gas mixture pressure at barrel; 9. technique for localization of gas mixture burning at barrel; 10. technique and point of powder injection into barrel; 11. ambient medium of spraying, and others.