There is nothing about this that I don’t like.
UPDATE — a little searching yields this photoset by photographer Donna Zoll from a museum show in San Diego. You can see closeups of the rig and get a little better idea of how it works. I love the first one — reminds me of a Dreamcatcher, which works really well with the whole rainbow theme. Cosmic.

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FEED
I love this! Imagine driving to work one morning and finding that every here and there some weirdo/genius has changed the dull grey of a factory wall or a semi-abandoned block to a colorful rainbow. Way to cheer up some people, dude!
Comment by Ortoplan — February 2, 2011 @ 6:06 am
And now make one for a DOUBLE RAINBOW all the way!
Everybody will wonder what it means!
Comment by Meidor — February 2, 2011 @ 9:43 pm
WOW! Nice big drive by rainbow! Always wanted to rainbow up my town. They Gray out very thing thats not an AD! But how could anyone gray out a rainbow!
Comment by Chambers — February 2, 2011 @ 10:31 pm
nice project, thank you
Comment by gatoAlfa — February 2, 2011 @ 10:32 pm
How about adding some sensor on the wheel and make it paint bigger rainbow while moving? same height but way wider =D
Comment by BadWolf — February 2, 2011 @ 11:03 pm
Sweet. Thanks from The Earth.
<3
Comment by Mudo — February 3, 2011 @ 5:38 pm
good vibes! great build!
Comment by stacks — February 3, 2011 @ 6:21 pm
Pretty or uplifting or whatever… this is still vandalism (which the author acknowledges in the beginning of the video). Yes, I agree it is better than some gang tag or foul language, but it’s still breaking the law.
Some removable alternative would have been better imo, liquid-chalk perhaps…
Comment by Joseph — February 3, 2011 @ 7:01 pm