[tsheridan]

I used bleach - then oxalic acid - then some light sanding but cannot get rid of black stain in wood on window molding - suggested that i stain or paint but am reluctant to do that - the stain is on middle window of bay window - and would need to stain or paint entire window

see attached photo

any suggestions for fixing issue would be greatly appreciated

tom

 

[Windows on Wash]

Looks like long term condensation damage or a glazing bead failure. Based on the depth to which it has shown, I am going with condensation. It has grown mold and dragged the dirt from the window into it. Have you tried a peroxide?

 

[tsheridan]

I haven't tried peroxide - could you advise what strength and application?

Thank you

 

[Windows on Wash]

Honestly...I have zero experience bleaching it out. It was mostly a guess. Test an inconspicuous area with some household grade stuff (i.e. for cleaning cuts) and see how it does.

 

[carpdad]

If non invasives don't work, then you probably have to scrape away stained wood. Paint scrapers. Lightly so you don't gouge or splinter the frame. Scrape some then try bleach again. Layer by layer. But it will come back unless the moisture problem is fixed. You could try soaking the scraped part with fungicide additives for paints.

 

[ron45]

Have you tried an eraser.

If it works and lightens the wood try putting some peanut butter on it for a couple of hours then wipe off.

 

[Dave Sal]

I have a similar issue with a couple of my wood windows in my living room. I know the cause though, and it is from condensation during the winter. Moisture fogs up the window and then drips onto the bottom where it soaks the wood. Going to clean it up and then put a coat of poly on it as it seems that the original poly was put on really thin.

 

[jenniferobert]

I used bleach - then oxalic acid - then some light sanding but cannot get rid of black stain in wood on window molding - suggested that i stain or paint but am reluctant to do that - the stain is on middle window of bay window - and would need to stain or paint entire window

see attached photo

any suggestions for fixing issue would be greatly appreciated

tom

I also faced this issue.
there is no option without paint.
all other methods like erasing etc are time wastage.
I suggest you, paint it with wood color.
if do not do anything, it's not looking bad
thanks

 

[Windowman123]

Based on the picture, it would lean more towards a rotted sash. With heavy condensation, you would see the wood discolored all the way across the bottom of the glass, not just in one corner.

The interior stops on these are usually easy to remove (see pic.)