Olaf Diegel is custom 3d printed guitar maker who will guide you trough the process of creating a fully functional SLS 3d printed electric guitar.
You will need the access to more serious equipment like SLS 3d printer and some tools, but they are much more available now and will probably be ubiquitous in the future.
The bodies of his guitars were 3D printed out of Duraform material (Nylon), on a 3D Systems sPro selective laser sintering system (SLS).
How does the 3d printed nylon guitar sound? Here is the answer:
He also made a 3d printed saxophone.