Not oxidized vinyl siding washed twice now had brown that won’t come off below the shutters please help . Tried re wash with stronger mix did not work. 3 gal sh 2 water and elemenator
I’ve ran into that a few times. Usually just use a pump sprayer with very strong hw mix. If that doesn’t work it’s probably rust. I don’t have much experience with rust removal so take my advice with a grain of salt but rust remover plus from Powerwash.com works good. I would just tell the customer it’s not coming off with the services they paid for. If they want the stain out it will be additional charge. I get paid to wash the house, not restore it. Do a great job but can’t sweat the stuff that out of my control like I did at one point in my short power washing career
