I would have my jeep in my garage at night at least but..... I'm still waiting for Black Ice to wear off so I've been leaving out side at night under a tree that craps all over it... Still no real degradation of Black Ice... Even when my dad let it get nailed by sprinkler, and I took a step further and left in the sun for 4 days before washing it. Well water spots washed right off. My car how ever has taken some swirls. I drove it through a car was tunnel 5 times(theres a video and couple review coming up soon for this) But even what I'm sure is NOT a ph balanced soap coming out of that tunnel was able to knock off the black ice. That stuff is insane.