Here is a bit of a different Hack- using a 3D printing pen to add a flexible grip to objects.

In this case I used an old, beat-up hammer to add a flexible grip with custom details directly onto it. I used TPU filament so the grip will conform to the handle and provide a nice, high friction, “rubber” like surface.

This approach can be used to add grippable surfaces to a whole host of other objects and I thought it was a great practical use for a 3D pen.

Full video describing the whole process and showing/testing the final product is here:
https://youtu.be/jfpKnkCGzzs