How to Remove Horrendous Mould Stain Before Staining?

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How on Earth can I get rid of this?!


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Mould deep into the grain?
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Mould even in end-grain of mitres!



Customer incorrectly applied internal Ronseal varnish to outside of door! Am looking at rubbing all varnish off, back to bare wood, then apply Sikkens two-part stain and filter 7.

Any suggestions of how to get mould stain out of wood grain first? Am applying a Polycell anti-mould wash and hope for dry weather leading and a couple more washes up to doing the actual job. But wonder how deep the stain goes!

Wood is meant to be white oak colour!



Thanks,
Neil
 
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It would be worth your while trying Oxalic Acid This is a mild bleaching solution taht has a good track record for this type of application.

Hope this helps

Ian McAslan
 
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its never going to look good, paint or new doors, be a lot quicker as well.
 
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I disagree , if the doors are protected using a dark microporous exterior coating the doors will last for many years before another thin coat may be required. New doors....I don't think so!
 
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they look like poor quality hardwood and will have a very short life and not worth spending money on
 
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Ian. Thanks for the suggestion of Oxalic acid. Will give this a try :)

It's only these local areas of staining that I fear for - possibly ruining the rest of the appearance of the door once correctly sanded back, stained and protected.



Cheers,
Neil
 
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