-Sorry for the incomplete description...
-As far as I know, all Corvettes painted at the Bowling Green assembly plant have a primer-coat,
a color-coat (BC) and a clear-coat (CC): A two-stage BC/CC paint system.
-The Corvettes designated to receive a premium "Tint-Coat" have a primer-coat,
a color-coat (BC), and a tinted-clear-coat (T-CC).
This is to affect a change on how the final "color" is seen.
Still a two-stage BC/CC paint system.
-There are some OEM three-stage paint systems:
[color-coat (BC), an additional tint-coat (TC), and then a clear-coat (CC)].
-These tint-coats usually cost more because of additional painting step(s),
including the necessity to purge and clean the paint-robots...at least twice per run.
It's not the paint that's costly to OEM's...
It's their assembly lines' downtime that's gotta be paid for...
One way or another.
Hope this helps some.
Bob