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Thread: Removing Mould from timber?
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8th June 2019, 07:40 PM #1Senior Member
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Removing Mould from timber?
Hi all,
Hoping that the brains department can help me with a tried and proven way of mould removal without sanding!!
This is on an old bread board as a result of a pot plant.
Thanks in advance
Matt
Northern Beaches Sydney
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8th June 2019 07:40 PM # ADSGoogle Adsense Advertisement
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8th June 2019, 09:16 PM #2
once wood has been mould marked, there is very little you can do ...... even sanding, is unlikley to get that out ... yo could bleach it .... but that will take colour out of the wood.
Any thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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9th June 2019, 04:37 PM #3Woodworking mechanic
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Depends on whether you want to eat off it
There are various timber deck cleaners that contain fungicides or there are mould removers that don’t contain bleach. Give the Bunnies website a trawl - there are a number of products there.
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9th June 2019, 07:05 PM #4Senior Member
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9th June 2019, 10:33 PM #5
Yeh good luck with that on bare timber that is already stained with mould.
Any thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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9th June 2019, 11:08 PM #6Woodworking mechanic
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9th June 2019, 11:23 PM #7
not bleach, it's acid and will have pretty much the same effect on colour.
Any thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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10th June 2019, 08:49 AM #8Senior Member
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10th June 2019, 09:22 AM #9
If you cant erase it, turn the whole situation around, I can the the 'shroud of Turin' or similar coming out here, make it a feature and put on youtube & ebay.
I would love to grow my own food, but I can not find bacon seeds
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10th June 2019, 09:36 AM #10.
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Cabot's deck cleaner is between 5 and 10% Oxalic acid which is a relatively weak organic acid and at that strength, provided its not left on wood for long periods it won't bleach the timber.
I used oxalic acid on a tassie oak bench top to remove some black iron stains. What happened was I left the bench top exposed while I was grinding some steel and a some iron dust settled on the bench to and reacted with the tannins in the wood making the resulting stain. I left the acid on for about 30 minutes
Pre oxalic acid use
PreOA22.jpg
After oxalic acid use and with a coat of BLO
You can see it does not appear to have produced any significant bleaching.
PostOA1.jpg
FWIW I made up my own oxalic acid 10% solution from pure oxalic acid powder I got from work.
Oxalic acid is toxic if sufficient is ingested but bearing in mind that many foods contain it (eg rhubarb) then this says you need to eat a lot to be affected.
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10th June 2019, 11:14 AM #11
iron stains on the surface are an entirely different problem to deep seated mould stains.
In addition Tas Oak has little or no colour.
Futhermore, you are showing us one picture with the stains and another that has been finished with product.Any thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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10th June 2019, 12:23 PM #12.
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If the stains were on the surface they would have sanded out which they didn't.
Anyway you completely missed my main point - ie oxalic if used with care won't bleach wood to any noticeable degree.
This is not the only time I have used oxalic - it was just the time I happened to have photos of the process.
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10th June 2019, 01:52 PM #13
you have completely missed my point.
pretty much nothing will remove deep molud stain without discolouring timber ... iron stain is not mouldAny thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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10th June 2019, 09:33 PM #14Senior Member
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I bought very mouldy very smelly unused hardwood breadloaf from demo yard a few years ago when repairing a deck.
We treated the wood with this The Flood Company Australia » Anti-Mould Products » mould_action
I don’t remember any staining from the mould but I do remember the mouldy smell was gone after we used the product three times. We painted the breadloaf once it was installed. I have used the same product on other painted surfaces, it did not remove all but most of the staining.
Sent from my iPad using Tapatalk Pro
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10th June 2019, 09:42 PM #15GOLD MEMBER
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Use Nappisan as a source of oxalic acid, soak it for a short time, scrub it and once dried, plane it.
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