Simply revamp the Vehicle Colors menu, for both donators usage of the command and the menu option in the gas station UI. As it is currently, you have to change or remember what color you used for the first car color option before you can choose a new secondary color. There could be a new menu that's simply "Change Both Colors, Change Car Color 1, Change Car Color 2" and also add a new option "Change Car Paint" to change the Livery of car for cars like Elegy and what not just for donators usage of the command.
