Not sure if this was suggested before already, but given there’s a lot of liveries for airliners, and GA aircraft are normally more “customised”. Adding an ingame livery painter would be ideal. Well it could be used for all aircraft. Kind of like what Assetto Corsa Competizione has.
No need to download livery files cause everything is implemented within the game but each aircraft would have a set of templates/patterns to choose from etc. and you are able to choose main/colour, detail colour etc depending on the patterns and so on.
would be a good addition for those that would like to spice up their aircraft without the need of downloading extra liveries and also having people online able to see that livery without requiring any downloads.