We are starting this project on wednesday of this week. I know in the spraying surfaces module, it says to use a 2% mix on stucco.  However, as the pictures show there are several different types of surfaces here and the stucco is not really dirty.  I was thinking of just using a 1% mix and on the few bad spots using a pump sprayer. What do you guys think? Do you see any other potential trouble spots? Thanks!