Customer wants vinyl sidings oxidation removed

Update
Got the chance to go back and do my first oxidation removal. Customer was over the moon, I am pretty happy, but if you look really closely you can still see some staining. House is kinda on a corner with this side exposed to everyone driving/walking by so now as they go by it isn’t nearly as noticeable and that was the objective.
I used BC Cleansol - diluted 4:1 first as directions state. Then I DS’d onto the siding. Let set 5 minutes, DS’d a second time, let set another 4 minutes and still saw some oxidation. Took my green 270 degree gutter scrubbing brush and brushed quickly while side of home (7-8 minutes) then rinsed twice. This was all done yesterday evening with the air temps around 45/50 degrees out. Came back around lunchtime today and here’s the results:


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