Yes but I didn't scrub the roof I wanted to see what the ch would do with the greenwash together without agitation. I can say that it pretty much melted to nothing and with very little brushing the tree sap came off easily.
Residue was pretty much non-existent. I pre-mix in my 65 gallon tank while setting up and pre-wetting vegetation, decks, etc. I do let it settle for a minute or two before spraying though. I going to try the strainer you talked about in a different post with a strainer sock and see if that helps with tank residue though.
We use a blended mix on everything but fences and decks. About 50/50. Plus if you sell the ch right they expect it to be there. Typically only gonna have residue on roofs anyway. The rest will get rinsed in the rinse process.