We soft washed a vinyl sided house last month with simple cherry & bleach (not sh). It has a green metal roof over the porch with a white stain on it.
She said it wasnt there before we cleaned and I rinsed it the day after with hose water and a soft brush. I couldnt tell if it was gone or not after i rinsed it. When its wet its hard to see.
1 Month later and she calls me today and says that the white stain on her green roof is still there.
I don’t have any pictures yet but, has anyone ever made spots on a metal roof when soft washing a house???