Then it goes through a pipe to the gun from which it is sprayed. This consistency is key because it is necessary to achieve a repeatable film thickness on the vehicle. This film thickness is key both in terms of aesthetics and economics. The surface specs in automotive are a whole lot different. Given that the clear coat has nothing on top of it, it has to be done right.
Blemishes are unacceptable.
The inability of powder to flow-out and the inability to accurately control the thickness of the material is the reason for the additional material. Another issue that has to be worked out relates to the interactions of the materials. This is a huge challenge with regard to achieving the required surface quality for the vehicle. There are similarities. So the facility was built.