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I've had 2/3 of a sheet of 18mm birch ply sat in the cellar for a couple of years now, left over from a bookcase build.
I've now got a use for it, dug it out and there's mould growing all over it with some discoloration.
Is there a way to rescue it? It sands off to a point, but there's still some black marks left in the grain.
I usually use HG Mould Remover around the house, but it says not for use on wood.
I also don't want it coming back on the finished item - I assume once its sealed with varnish, no air = no mould?
At current prices its ~£100 worth of timber, so I'd rather not scrap it unless it really is beyond redemption.
Thanks!
You can kill and clean with a simple bleach solution, but chances are any staining is going to remain.
Oxalic acid is what you often use for discoloration and staining on timber but usually only in small areas, or at least I've only ever tried it on small areas. Usually where a sash cramp has contacted a glued joint and left a black stain.
You'd have to try a discrete area first and see how you go.
It "might" be OK once the fungus has gone, but it may already have started de-laminating, and it may be a mm or two thicker than it once was, and soggy...
I wouldn't use it anywhere rigidity is required, a balance bike fr'instance.