It is a special thermal paint in the form of powder that is mixed with water and applied to the metal surface and left to dry in the air. This paint is then placed in ovens with a temperature of approximately 800 degrees Celsius until the paint melts and adheres to the metal surface. It is called heat-resistant, water-resistant, and all atmospheric agents enameled paint. It is used in painting ovens and in painting metal parts that are exposed to high temperatures, such as stoves. This paint contain special glass called firit. Buyformula website will teach you the best method for making automobile  polyester putty. Formulas are available in PDF format file, that described in technical English language.