April 11, 2010. I don't know how this is done, but I love the chalky white background of these post poster surfaces. The dark sweeps of the roller cross the surface to provide a background for the swatches of purple that start and end the frame. Did someone do this on the run - a sort of kamikaze approach to this subway art? I don't know how long it will stay, but I want to enjoy it while it is there.