276855cb_Grand_Theft_Wiki__the_GTA_wiki__Description
[Unique trait] Unique paint job [Code] Name of color [Description] 
The vehicle's paint job is unique and cannot be obtained through spray shops, mod shops, or permanent parking spots. However, the unique paintjob can be painted over and lost if the player enters a spray shop with the vehicle.
Special Vehicles in The Ballad of Gay Tony - Grand Theft Wiki, the GTA wiki
Description