F13 and Oxidated vinyl question

[PPWofLexSC]

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 s…