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Artist and not a curator
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The MSDS says it's Sodium Percarbonate. Since i haven't tried one based on that, I'll have to try some.
That works great for getting the grey out and grease stains, however has to be neutralized with oxallic acid, and the sodium per carbonate doesn't touch metal based stains like oxalic does.
 

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Well got a chance to test it out on some PT before I put it on customers deck.

Here's what the PT picnic table looks like after 3 years. With a Behr sealer put on after a year. I won't even go into how crap their sealers stains are. The screw driver does the taking. Lucky this was not a customers deck .



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image-4025093205.jpg

I will post the after pictures in about an hour. I don't a cleaner, brushed and hosed area, cleaner and pressure washed area and finally a pressure washed only area.
 
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