In our next major publish (6), we will allow Master Artisans to craft a Vehicle Customization Tool. Any player will be able to use this tool to custom hue the body and the trim of their vehicles. Simply target your vehicle (or one you have been given permission by the owner to customize) and use the tool. Each individual color customization takes a "charge" off the tool.
Beware, these colors may change over time. You may need to get periodic touch ups to keep your vehicle's custom color.
Additionally, characters will soon be able to own three vehicles in their datapads instead of just one.