Photoshop Ghosting Tips, Tricks and Techniques for Technical Illustrations
http://www.khulsey.com/photoshop_tutorial_advanced.html

Hulsey, Kevin
Kevin Hulsey Illustration
2006

Abstract:

A "Ghosted", "Phantom View", "Transparent", or "See Through" technical illustration is one that renders the exterior skin of an object transparent in order to see the interior workings. This Photoshop tutorial will cover the basic techniques used to render a ghosted technical illustration using the airbrush technique.