“Dear PoPville,

Why does the monument has this streaking? Looks like it’s been power washed, I’ve never noticed it before. I might have thought it was some crazy trick of the light, but it’s like this on the east side as well. Tried looking it up online and only came up with an NPS acid rain article but I’m not sure if that’s the cause. Searching made more difficult since the monument is two different colors every day.”