Here the valve body surface is debarred and finished by sanders and flexible shaft grinders for better appearance and smooth finishing. One coat of corrosion resistant primer (red oxide) is sprayed, and if any uneven surface is observed a high temperature putty is used, after which selected colours for different types of valves are sprayed twice for a superior surface look.
Here it should be noted that valves which are manufactured for IBR approval are not painted initially. They are offered for inspection by the concerned inspectors without paint, but in a completely assembled stage. The IBR number allotted is then punched after inspection, and paintings is done only after this.