Need a waterproof enclosure for your small project and want to have a nice control panel feel? If it will fit in an Otterbox 2000, you can lasercut this plate template to fit inside the base, supported by the interior ledge! There's room underneath to hide your Arduino, Teensy or Pi (without ethernet), plus a small battery.
To test the spacing on this one I've added a basic potentiometer and some Radioshack buttons. The knob on the pot just barely makes contact with the top lid when the case is closed.
If you use clear acrylic, you can etch the underside in reverse, which will protect the labels. It won't hide the wiring mess, but perhaps you like the "skeleton clock" look.