Does anyone know what these drips are? I’ve washed this wall on a parking garage and noticed there was drips when it dried. Came back and wiped them down with a towel and it looked perfect. Even once dried. I come around a week later and the wall looks dirtier than before. Why do these drips keep coming back and is it maybe a chemical reaction from the metal?
The first pic is before, second is after the wipe and the third at night is when I noticed how dirty it was again.
Try like water stain and environment fall out. You need a good de-greaser. Sh then de-greaser should clean that right up.
Just a word of caution, I found the parking garage you’re on in less that 4 minutes. Same deal with your Dangers of Galvalum topic. If you want to post up pictures of your commercial work just know that some here are your direct competitors and have ill intensions.
Yeah I’ve worried about it before. Figures what goes around comes around and if they do something with ill intentions karma will eventually work it self out 
hopefully haha
