(Lindy Liggett, Krist Palen, Emily Mackevicius, Emily Gobaty, Adina Roth, Abdul Alfonzan, Chintan Vaishnav and Hyundo Lee)
We made a painting head for Ilan Moyer's Fab In A Box machine. It has a stand to hold cups of paint, and a head for the paintbrush, and circuitry and code to control the movement in X, Y and Z.
Here's the firmware, python code, and a bunch of pictures: