Electric guitars get a taste of 3D printing with ODD Guitars by Olaf Diegel. The guitar bodies are made out of nylon and they dyed through a two step process for the finished look. As they mention, in terms of construction this is much like any other electric guitar.
A wooden mahogany or maple inner core is used to provide for the fine tuning of the guitar’s core that joins the guitar bridge to the neck. Quite similarly, the neck and fret board are made from wood too. With the basic functions taken care of, the body is then 3D printed into different shapes and forms.