Patches of white paint covered and erased graffiti on the back of a building in downtown Eugene, Oregon.

Smaller patches of white paint covered and erased graffiti on the back of a building in downtown Eugene, Oregon.

A closer view of one of the white patches used to erases graffiti.

Someone wrote graffiti between two of the patches of white paint.

Elsewhere black paint was used on white siding to erase graffiti painted there.