Yes, as @CanYouFoush mentioned in the chat.
You can pull paintjobs from the rFactor HydroMod and put them into
HydroSim > HydroSim_Data > StreamingAssets > Teams
Create a folder for the team, then rename the DDS files:
SaltWaterScoop.dds (Don't need this one yet).
Keep in mind, nobody else online will be able to see any custom teams unless they also have them.