Ok, paint schemes are NEVER added untill the testing is DONE. Most test cars will not see paint in their lifetimes.
Manufacturers tape over any part of the car that is "new" like lights ect. this allows the lights to work, but not allow people to see the outline of the car's lights.
For example take the Carrera GT, before official photo's were released, they taped up the edge of the lights, so that people could not tell if they were boxter type, 911 type, or turbo type. And of course when it was released, innovation! None of the above!
Do not think that the two lights that appear at the back will be all, you are just getting a glimpse.