At the factory level, a vehicle is submerged in zinc-based anti-corrosion chemicals
. It's a process that allows the paint to access remote areas of the car in the painting stage that would be impossible otherwise. Next, the vehicle is treated with two-part sealers and epoxy primers. This process allows the paint to adhere permanently to a metal surface.
The next step is to apply a clear coat of paint that has a positive charge. This is usually done via a computer-controlled spray system and provides the base coat with respect to the application process. On the molecular level, positive ions within the clear coat draw those in the negative base coat to the surface.
This process makes it possible to see three paint variances for three vehicles of the exact same paint code. Professionals at facilities with the right collision repair training and experience are tasked with the responsibility of combining variant colors for perfect matches.