Heelloo, if you need any liveries/custom textures designs, things like that I'm happy to help! (Did a lot of FiveM texture work)
Not entirely sure, I know how to add liveries but radio textures may have a different way (I think it's the same way but idk), if it is a different way then I can learn how to do it.
Basically, just hit this drop down arrow and select this wireframe button, then take a screenshot. Also I can help you with creating and mapping the materials, just shoot me a DM if you want.
Shhh... i have school so i cant but when i get back from my home country ill do a "revamp" so ill start from the beggining (ill do new jbeam, import the new model and maybe have some one help me with the textures please)
Translation: He isn't happy with the way it's turning out so far, so when he gets back from whatever he's going to restart it.