Hey there fellow pressure washers got a question for u more experienced guys got some sort of grit and grim that is about 2 feet below the lip of the roof on a house that will not come off with house mix the house is oxidized vinyl so I don’t want to hit it with a brush and make splotchy marks was thinking about adding some ebc to the mix my question is will this take off the oxidation as well as the grim and should I add it to house mix or just do a mix with ebc
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