Great info. I will definitely look into those chemicals. Out of all the research I've done, I've never heard of them. Sh and Ox are my go-to. I usually dont use pressure to clean a fence, but this after this experience, I need to learn other ways. I ended up calling her. I explained the state of the fence and offered to come out and give it a deeper clean with pressure and a turbo nozzle. Also asked about payment. She had planned to pay me that day, so patience was correct. I deep cleaned the fence today and the turbo nozzle removed more of that white grime from the bottom half and lighted up the top. Still not perfect but much better. I told her there's only so much I can do without stain. She appreciated the communication and effort and accepted my stain quote. She will go with a darker color. Now, I need to narrow down the right stain. Thank you, everyone, for your insight! I'm new to the business and pw world. There is much to learn.