Went searching for and found these images of the early robots.
The first robot started with a lot of wood pieces.
The very first paint head was a disaster, but this second one worked real well.
The Second Robot was built to be more mobile. It fit just barely through doors.
The third, of which I have lost all the photos except this one, was built to be massive. It filled a room. Also important was that it had an open face so I could photograph the painting more easily in order to use feedback loops in the painting logic.
After these unnamed machines came Crowd Painter, BitPaintr, Neural Jet, and cloudpainter.