Designer Stefan Rechsteiner has come up with the Couleur sur l'Objet concept as a modern way of applying "urban art" to walls in hard-to-reach places. Equipped with a can of spray paint, the little tyke would be like a badly-behaved roomba with a vacuum-suction mod to keep it in place. With its accompanying design software, you could presumaby use to it create large-scale murals on walls that would previously have required some serious (and conspicuous) ladder-work. Town councils everywhere had better invest in new grafitti-cleaning tech of their own— we suspect this won't remain a concept for too long. [Yanko Design]

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