We introduce D-Coil, a new digital 3D modeling approach using wax coiling to bring tangibility to the design of
digital models. After defining a shape to extrude, the users follow the lead of a hand-held actuated extruder to
instantiate the actual extrusion using wax. The tangibility of the wax extrusion sets the stage to create the next
components until the digital model is completed. The digital model affords all digital attributes (ease of
transformation, distribution, and 3D printing) while the wax artifact can be discarded or kept as a one-of-a-kind
memento. We present a proof-of-concept implementation of D-Coil and showcase how this additive approach can also be extended to a subtractive process using a digitally actuated cutter. By adding a 6DOF mouse, users can also include scaling, rotation, and bending effects to create a wide variety of shapes often difficult for novices to produce in standard CAD software.