This may be more of a Southern California question, because I've seen this phenomenon more here than anywhere else. Does anyone know... for sure... what that golden yellow goo is... the stuff that gets all over your car when you park it outdoors? It doesn't look like bird droppings at all. It has more of a manmade look. Someone once told me it's stuff that drops off of airplanes. Ya think? That has kind of a tall tale feel to it. Anyway, I've just washed my two black cars and they were spotted all over. It doesn't wash away easily. You have to scrape it with a fingernail.
What the heck is it?