removing stains from the wood. - Router Forums
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post #1 of 21 (permalink) Old 09-24-2013, 03:18 PM Thread Starter
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Default removing stains from the wood.

Hello to all.

As you know, I use a lot of recycled wood for some of my woodworking projects. The wood comes from pallets or boxes that have nails, screws and other metallic fasteners.

Recently I was making my coffee table and I came across with several stains caused by those elements. It didn´t matter how hard I tried, the stains were not removed at all. I looked at in the finishing touch section (General woodworkin sub-forum) and didn´t find nothing that could help me.

Does anyone know how to deal with these stains (See the picture below)?

Thank you in advance.
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post #2 of 21 (permalink) Old 09-24-2013, 04:00 PM
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If you're staining your piece dark, you probably won't even see them after you apply.

If you stain it a bit lighter, you will probably see it a bit. Perhaps not as much as you think, though.

Unfortunately, those stains probably go as deep into the wood as the fasteners that produced them.

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post #3 of 21 (permalink) Old 09-24-2013, 04:04 PM
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You'll probably not get the answer you'd like. Iron in the nails reacts with the tannin in the wood. From the looks of the stain in the image I'd say the iron (more accurately Iron Acitate) has migrated a good bit for the stain to be that large. The only way to avoid it is to cut around those sections when laying out your cuts for the project.

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post #4 of 21 (permalink) Old 09-24-2013, 06:28 PM
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Bleach 'might' work. Or might not. I would say worth a try. I have used bleach successfully, at times, in the past. If I recall right hydrogen peroxide might work also.

Found this:
Use a Oxalic acid solution on the wood and brush with a med bristle brush then follow up with a clear water rinse. You may have to try 2-3 times but it works well when refinishing old furniture. You may want to try it in an area that is hidden to be sure you don't get any unwanted discoloration. This will remove any oils that have not penetrated too deeply that may be on other parts of the stock causing unwanted discoloration..
Here:
http://www.opticstalk.com/any-ideas-...opic23261.html

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post #5 of 21 (permalink) Old 09-24-2013, 07:50 PM
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I've seen log house builders use a strong bleach solution to lighten old logs up. It won't remove all of it but it might lighten it.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #6 of 21 (permalink) Old 09-25-2013, 05:52 AM
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I was reading something about the recycled wood, is it safe to use it?
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post #7 of 21 (permalink) Old 09-25-2013, 05:57 AM
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Alexis there is a product called 'Iron Out' here in the states that would probably remove it form the surface, but as someone has said the stains go as deep as the nails.

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post #8 of 21 (permalink) Old 09-25-2013, 09:44 AM
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Quote:
Originally Posted by Carpenter12 View Post
I was reading something about the recycled wood, is it safe to use it?
I hope so, that is where I get almost all of my wood. Make sure to remove all nails and staples.
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post #9 of 21 (permalink) Old 09-25-2013, 10:39 AM
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Quote:
Originally Posted by Carpenter12 View Post
I was reading something about the recycled wood, is it safe to use it?
Like most things, it depends. If you use wood from pallets, you have to watch out for nails and staples, they can tear up your tools if they are not all removed. Other than that pallet wood should be fine to use.

Any treated wood, I would stay away from. The chemicals in it could make you ill, or animals.

But what is generally meant by 'recycled wood', is wood that is reused for another purpose. Like you find an old table, and use the wood to make something else.

What were you reading anyway?

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post #10 of 21 (permalink) Old 09-25-2013, 12:14 PM Thread Starter
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Thank you all, guys.

I´ll try with oxalic acid the next time. I prefer to keep the grain in the wood that´s why I do not paint my small pieces.

As some of you have written, I never use treated wood even in the fire pile. I use wood from pallets, boxes and disposed off furnitures.

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