You’ll see we are adding more and more detail at this stage. The door handle is there, along with some more lines of varying thickness, to add or remove emphasis. It is all about creating a three dimensional feel. If you are able to, park your car against a nice background and take a photograph of it. You’ll see lines that indicate the positive and the negative surface treatment. Try to imitate those lines in your drawings and it will help to bring your sketch to life.