stucco cleaning after dust storm 2
https://sierra-wiki.win/index.php/How_Desert_Storm_Home_Maintenance_Can_Protect_Your_Phoenix_Property_After_a_Haboob
After that dust storm blew through, the stucco on our house looked like it had been sandblasted with grime. I spent the weekend carefully hosing down the textured surface, working from top to bottom to avoid streaks, and using a soft brush on the stubborn spots trapped in the stucco's rough finish. It was tedious work, but seeing the clean, original color come back made it worth every rinse.