# Wood Cleaning?

I have just started reading about wood cleaning. My current setup is a 12v Softwash 5.5gpm (with a proportioner) as well as a 4.0 gpm 4200 psi pressure washer. I also have a J-Rod.

Could I apply a 1%-2% SH mixture with the 12v and let dwell and then rinse with the pressure washer? I mean sure I could rinse with a pressure washer but I guess my question is more along these lines, what tip would you use to attempt to achieve 1,200 psi? Would the J-Rod get it that low? White tip?

Iâ€™m fairly novice to fences and wood, but so far on really bad fences Iâ€™ve had to use 4% sh, dwell and medium pressure rinse around 1500psi then neutralize with oxalic if needed. I tried percarbonate but didnâ€™t do much.

Hereâ€™s a really good calculator a lot of us use to find nozzle size.

Where did you buy the percarbonate and oxalic?

On the link you sent, when I fill in the blanks (specifically on the orifice size) is that referring to the degree of the spray with the nozzle that you choose? For example, if I choose a 40 degree nozzle would I place â€ś40â€ť in the orifice space?

I canâ€™t remember the size opening on my J-Rod.

Right, so a 1500psi 40 degree nozzle for a 4/4 machine would be a 40065. Numbers are stamped on the top.

I just got small tubs of ox and percarb on Amazon, wasnâ€™t sure I really wanted to use either.

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Did you prefer the Ox or Percarb? Or did you notice a difference between either?

Iâ€™ll defer to the veteran cleaners on here, I rarely do bare wood enough to say.

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When you say â€ś4/4 machineâ€ť, what exactly is the 4/4? Sorry, Iâ€™m still trying to pick up on some of the lingo.

4(gpm)/4(000) psi, standard issue direct drive pressure washer. Sometimes youâ€™ll see us use 5.5/3000 or 8/3500.

When you decide to upgrade, GPM is much more important than PSI. The highest pressure I use is ~2800 and thatâ€™s just to pop lichens on concrete or using the turbo nozzle on brick. 2500 is plenty for concrete driveways.

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Should answer all your questions. Just remember every wood project is different, different wood, condition, type of dirt, age of wood, etc., thereâ€™s no set application for every job. Get you a longer wand 4-5â€™ if doing fences and just get the correct nozzle for between 1200-1500 psi.

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