However, this product only exists in theory and not yet in real life. On the other hand I have tried a real bicycle painting tool on the closed down Andrássy street in Budapest:
They took a fixed gear bike, mounted sponges to each of the tires and connected them to bottles filled with colorful paint. Well, a certain area of the street was covered with paper for the painting purpose. Still fun to leave some bikeprints.
Me on the painting bike
But don't be sad if you don't have the opportunity to ride a painting bike. Just wait for the winter and leave your bikeprints on uncleared roads in the snow :).