[VRM]

Jamo,
I'd suggest staying away from the Testors spray bombs for the body paint. Go with Tamiya spray paint with no primer. Most people have really good results right out of the can.
If you really want to get nuts about it - get an airbrush and use some automotive lacquer.
Try to avoid painting in humid weather, though.

BTW, How about a model car and collectibles forum on CC?

Steve