http://vector.tutsplus.com/tutorials/illustration/draw-a-realistic-vector-guitar-in-inkscape/

This tutorial will go over the techniques used to draw a realistic guitar from scratch using the free vector program Inkscape. To complete this tutorial, you should already have a basic knowledge of vector tools, such as: the Pen tool, Edit Path Nodes tools, and you should be familiar with the Fill and Stroke toolbox. Let’s get rockin’ vector style.