First time homeowner wash left oxidization

I bought my first pressure washer, and decided to try it out on my house entry way. I did the pavement with the second to highest pressure nozzle using only water, which cleaned it great, and decided to give the vinyl siding in the entry way a spray off too. It looked nice when I finished, but the next morning most of what I cleaned was oxidized.

I have just discovered on this forum that either I caused this by washing the siding with too high of pressure, or the oxidization was likely there when I washed, and I simply exposed it by cleaning. The good news is, we’re only talking about a 10 foot long area of siding plus a metal gutter that has also oxidized, so even if I have to fix this by hand it won’t be too bad.

What’s the best approach to removing the oxidization? I wiped some of it with a dry rag which helped some, but is there any way to do a little better job of restoring it? I guess I should have done some research before jumping into trying my pressure washer out. At least I didn’t do my whole house! :joy: I don’t expect I’ll do any further siding cleaning myself, but would like to get this area fixed up as best as I can.


Good thing you didn’t destroy someone else’s house with high pressure. I love going to give an estimate and seeing high pressure swirls and squiggle marks. They never want to pay to have their mistakes or the mistakes of a cheap contractor fixed so I usually walk away. One woman recently said she had those lines and squiggles on all 4 sides of her home…and wondered if it would I fix it?..nope. Too much work.

If you want to wash a house correctly you have a lot of research and reading to do.


I’m not asking you to fix it, I’m asking what the best way to go about fixing it is? I understand I did it wrong, and what I did wrong.

All your answers are here and archived for you.

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Yes, there’s at least 2 or 3 good threads on it. It likely comes down to scrubbing the entire house although there are a couple of methods/chemicals that may fix it short of that. Good luck.

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Replace the siding. It almost looks like you used pressure to wash it. Replace the siding and call someone to wash it professionally next time


Guys are such keyboard tough guys in here.
One smart a$$ after another!
“You know the type
Loud as a motorbike
But wouldn’t bust a grape in a fruit fight!”~JayZ
These guys were all born pressure washers from the womb don’t you know!

That said you will need to scrub that whole side with a brush soap and water to blend it in.
Other options will prob do you more harm until you do ALOT of Reading.
I mean hours of reading before I’d even fire that washer back up again!
If that was a customers house you would really be in a pickle!

Thanks Laidback, and all for the replies! I will get out a brush and some soap and water and just clean it by hand. The posted photos are not of my house. Mine is nowhere near that streaked and bad, so if I can at least blend the oxidization with a brush and soap/water mixture, it will probably be okay. I’m not at home to take a photo, but my case is more one of a bit patchy looking. The siding is over 20 years old and is otherwise holding up fine. And again, this is just an entry way wall that’s probably 10’ x 8’, so a pretty small area.

Are you guys really replacing siding for oxidization? Seems a bit extreme, but I guess you all have done this more than I have. I bought the washer for cleaning stains off my concrete and to blast some old paint off my deck so I can replace a rotting board and repaint everything. I really have no plans to do any more of the house. I just had it out of the box and was seeing what it can do, which apparently can be more than I bargained for.

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Please refrain from posting unless you can be constructive, offer sound advice and be civil


I thought the photos were yours. Sorry. Brushing with soap and water will not rectify the problem

You’ll want to make a mixture up of either Vinyl Renu or Gutter Grenade. Spray on, scrub, and wash off.

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Please don’t so that. Those are two completely different products. The answer is here if you look for it.

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@Innocentbystander I’ve had great success with Vinyl Renu. I haven’t tired the Gutter Grenade yet, but have heard it’s worked well for people. Have you had a different experience?

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Vinyl renu is good stuff, especially for shutters. However, it’s not something you spray on, scrub and rinse. Degreaser shouldn’t be used on vinyl.

I should clarify I was only referring to the first step (oxidation removal) of vinyl renu. There is a second step with vinyl renu that is “painted” on.

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I would have said use gutter grenade too! I’ve heard plenty of guys here say they use it for that purpose !

I thought plenty of guys were running ebc as a surfactant.

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Ebc is a degreaser, not a surfactant

@Innocentbystander what is Ebc? I know you said it’s a degreaser, but is ebc for hot water washing, or is it versatile ?

Man, searching is really easy.

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