Depending on plant and time period examples have been found like the example posted. Especially noticeable on cars with high contrasting colors such as exterior white.
On a restoration you should still be able to see that the outer edge is direct application and the majority of the inner area is a heavy misting. As mentioned the white really makes it stand out. In comparison a Poppy Red exterior over a red oxide floor makes the over spray (if applied this heavy) almost disappear