Gster - Alright I'll give moving all them closer together so theres less space between the painted areas, maybe all those pieces towards the top and the back of all the pieces on the bottom of the UV editor so that they're both seperate.

Mastone - I am using mental ray, didn't know there was a car shader and looking at that diagram gave me a headache, don't know what the majority of that means. Thanks for the help, maybe I'll try and figure it out if it comes down to that.