Unsolved Create UV map for mesh

Hello,
I have been looking for resources to be able to create a UV mesh for an item and have it skinnable. In this instance it is a roof sign for on top of the Beam cars.

Would anyone be able to help point me in the right direction to learn how to do this? As well as the same for a whole new vehicle as I am process of modeling a couple new vehicles to add to the game at a later date.

Any help is appreciated!

 

for making your own skin with your own car

and this for skinning in game cars.

 

This is great! Thank you so much! I do a lot of skins for beam cars and other cars that are added to the game, but this will help be able to add UV maps of my own. Thank you!