Staining in wood

[cagey]

Anyone know how to remove the black end grain staining caused by water absorbtion, also white just below the surface staining. Wood is Beech I think but not sure ( factory fit Sigma 362 )
Thanks
Keith

 

[VicS]

Oxalic acid ?

 

[Amulet]

I have about 2 kilos of oxalic acid crystals - free to someone who's nearby - Cornwall's to far sadly.

 

[cagey]

Considered oxalic, but this is long term staining due to end grain water intrusion and it is probably deep fungal staining. Will use oxalic as a last resort but was thinking along the lines of a fume cabinet. Cabin is in pieces for another project at moment so can treat individual pieces away from boat. Sodium hypo seems a possibility but am at the limits of my knowledge and dont want to cure one problem only to have a nastier prob bite me in the bum
Keith

 

[paulburton44]

After 4 of us and the dog sleeping on our 23 foot boat last Easter we had a lot of condensation. This soaked into the end grain of some trim and left black marks. I was horrified.......but a few weeks later with planty of warm weather it all dissapeared....how happy was I ???

 

[VicS]

[ QUOTE ]
fume cabinet. .......... Sodium hypo

[/ QUOTE ]
??

 

[Paulka]

FWIW :
have a look there
I didn't try it yet, but may be worth a test.

Hope this helps.

Paul

 

[VicS]

[ QUOTE ]
but may be worth a test

[/ QUOTE ] Boracol 20 and Boracol 10RH bottom of this page are frequently recommended treatments equivalent to the DIY potions described there.