hey guys I have a 20,000 sq ft building to bid on but what I really need help on is the mix. This place is dirty!! I don’t think my house mix is going to cut it. I will be DSing at about 10 / 1. How strong and how much. I was going to ask if I could test a mix on the place(I know the person who run’s the place) but i’m just tryin to get an idea. And I try not to let the mix dry on a house but would it matter on this, its painted stucco.