Webber, The best thing to do is pay a visit to your local Radio Control Model shop. Usually they will have a couple of different makes and more coulours than you can shake a stick at. If you havr no local store, then I would recommend
http://www.evolutionmodelsport.com/content.php. I used these guys quite afew time and they always delivered quickly. You can find the paint in the bodyshells part of the site.
The paint may at first look expensive, but it will last very very well as long as you use it properly. BIGGEST Hint I can give you is: '
lots of thin layers'
If you need any more advice then send me a PM.
Daf