Not every cetamic or glass coating is real glass coating
Inorganic Glass Coat firmly layers of crystallized silicon dioxide (SIO2) which have very high strength level from 5H to 9H (it is very close to the diamond hardness level which is 10H) As much concentrations of SIO2 are as high that much pure and hard glass , normally inorganic glass coating having concentration of SIO2 from 70% upto 90 % and as much high concentration that much expencive glass coating
Organic coatings are paint coatings and not glass coatings, what u see available on autogeek and polish bliss type sites mostly Organic paint coatings, Organic paint coatings are synthetic man made products and like paint sealants but their protection is stronger and longer than normal paint sealants like 1 year to 2 years depend upon make , application method and maintanince later on.
In Pakistan following 2 persons using real Inorganic paint coatings
1) Khurram Fahim bhai SAC Karachi
2) Me nacheez 
Rest if any one claim for glass coating than its not true
