Cars aren't hard to light, but you do need the right lights to start with. Large diffused light sources are good for showing the shape and gloss of a cars surfaces and shape. I couldn't have done this with a single light, or small sources.
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However, you can also light it with smaller lights as long as you are not trying to light the entire car, and the car is secondary to the main subject. In that case you use get away with less lights and using different angles to accentuate parts of the car, but not all of it. If you try to get it all without the right lighting, you spend so much time chasing reflections and trying to eliminate or reduce them.
Keep in mind too anything around the car will be reflected in the cars finish, especially if its a dark color. So plan your shot carefully, and check the car for reflections often while shooting.