always thought aston martin should make a super car, so i was in a drawing mood today ( ) Its like a saleen s7/vanquish baby with a hint of enzo (over all profile sort of), carerra GT (rear wing) and mercedes CLK GTR (front of the side profile). BTW i cant draw stright rims for the life of me. theyre supposed to looke HRE 545 ish
Shading, usage of tools like a ruler, protractor and compass. Its a good start but with the usage of some tools and more practice you can make a lot better sketch. The basis of any sketch like this is likely to be the 2D front, side and rear views but you really do need several 3D Front/Side, Rear/Side, Rear/Top, a high Front/side etc... angles in order to get a real grasp of a cars look.