How to clean old decking prior to staining?


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Old 07-18-19, 11:25 AM
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How to clean old decking prior to staining?

I am staining my porch and I am unable to get a consistent finish on the bare wood before I apply stain.

Its an old home we purchased recently. The porch was painted so I removed the paint using a power washer and chemicals. However I was unable to remove all the paint, so I got a “Diamabrush” head for my 4-1/2” angle grinder and used that to remove the paint.

now that all the old paint has been removed I am realizing that the bare old is “ugly” and dirty. I applied a little stain (oil-based Stain, Perserva Wood Tacoma Brown) as a test, and the stain looks great on the clean boards but accentuates the finish on the ugly boards. (I can’t figure out how to add a picture on the mobile site at this time.)

how do a I get a consistent finish on my porch? I’m wondering if the wood is just too old and damaged and I should replace it all?

I tried an orbital sander with 80 grit paper with minimal results. I also tried “skim cutting” the top layer of wood with the diamabrush with mixed results as well.

First time home buyer and first time poster so any help is appreciated.
 
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Old 07-18-19, 11:28 AM
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You might try applying a deck brightener, that will lighten up the darker wood. I generally clean decks with a bleach/water solution and it pretty much does the same thing.

Old decks often don't take transparent or semi-transparent stains well and will look better with a solid deck stain [looks like thin paint] Hard to say without seeing what you have.

almost forgot welcome to the forums!
 
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Old 07-18-19, 02:28 PM
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Pretty good review of cleaners here:

https://www.deckstainhelp.com/catego...eaner-reviews/

FWIW at our last house we used to use the Wolman product and it did a decent job, but I notice some of the other products have higher ratings.
 
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Old 07-19-19, 06:53 PM
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Thank you for the input, much appreciated.

I have pictures attached. My concern is the wood doesn't look "clean" and the finish quality is very uneven. How do I get a consistent, clean finish (looking like fresh wood). I think, after reviewing your comments, I need to use a deck cleaning agent and power washer to do that?

if so, next steps would be;
  • wet deck with water
  • apply deck cleaner
  • scrub with brush (per direction on cleaner bottle, duration, etc)
  • power wash

At this point, the deck should look 'like new?'

then,
  • let it dry >24 hrs
  • sand with orbital sander, 80 grit
  • remove grit, clean with blower
  • apply stain?



 
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Old 07-19-19, 07:04 PM
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...adding pictures...hopefully. same deck just different lighting but the wood color is quite different
 
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Old 07-20-19, 02:23 AM
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Those pics don't show what I was expecting to see. Cleaning might help but I think I'd try a small section first [rinsing with a garden hose is fine] I suspect it will take sanding to get to a clean even look.
 
 

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