So the paintpoop from the Fashion Island show yesterday is they are not SELLING custom colors.
It seems if a client has prior knowlage that Tesla is doing it they will do a custom paint. It's not an easy process for them.
After primer the car is pulled off the line and sent to an outside paint shop and returned to the line. Got a cool lecture on the science of painting, paint guns, testing and durability finish of paint thickneses. It's not as easy as one would think and just switching colors in the robot painting "pot".
Turns outa after as many as 50 full car paint tests per color the right combination of paint flow volume and robot gun paint speed is determined. They can't put in different color and offer the same guarantee of quality that the stock colors will offer. As you can imagine they test with thickness gauges and other high tech measuring devices.
The Roadsters were partially robot and partially hand painted so an artist could see and adjust on given a custom color. The Lotus factory did insist that the paint be a Dupont paint but I found that every paint maker has every paint color (so a "dupont" or "PPG" body shop could do paint work on any car). Maybe the custom Roadsters were fully handpainted in the line by the experts do did the hoods and other small parts.
I will also note on the Tesla factory tour the excitable paint foreman talked about how getting a paint formula to perfectly match on metal and the plastic bumpers was a BIG deal. Not sure if he meant finding one ideal paint formula or having different mixes made up for each so the dry to the exact same shade, tone and density.
So if you had heard about it and you opt for custom,
It will take a lot longer
Cost a lot more (A deterring $12K apparently)
And I would not be surprised if paint longevity had a limited warranty on lifespan since it's done offsite.