From the description its prob forms an organic film containing ceramic particles (kindof like pigment).
If its truely a ceramic, then its inorganic materials that must be melted together and to the substrate.
Porcelain was a common 20th-cent ceramic applied to steel and cast iron.
eg. Independence Porcelain Enamel
Some are baked, others can be applied with flame or 'plazma'.
AFAIK all processes will require very high termperatures.
