How to create a car body ??

i have seen some tutorials of creating a car surfaces by extrude.... but its nothing other than a box!! i wanna learn to model the professional and real looking cars.. i have no idea that how to create car surfaces or fabricating parts .. can anybody suggest me any tutorial or method to achieving or learning this ?
3 Answers

Lot's of work with projected lines is here:
https://grabcad.com/questions/tutorial-how-to-model-a-camaro-body-in-solidworks