This was done way over on the other side of San Francisco. No ladder needed. Just xjet the chems and rinse with a ladder saver nozzle
What was the surface stain there? Mold, mildew, iron...?
Looks great Carlos .
Mold and mildew on this one.
SH and it's bye bye time! That's nothing over here Carlos. We have high concentration levels of iron in our irrigation and domestic water systems. Sun baked on iron deposits that... Oxalic, "The Works", SH, you name it can't take off without lot's of manual scrubbing. It's bad.
I cringe at the thought of that. Best to you bro!!!