I left extra wood on top of the filler piece for sanding down to the level of the surrounding wood. The top surface was slightly darker than what I wanted but not too bad. But after sanding down the filler plug to blend it in, it suddenly decided to turn black when it got down to an underlying strip of grain. 
The fit of the plug worked out beautifully with no glue line what so ever. But because of the color difference it stands out like a black fingernail on Edgar Winter's hand.
I tried applying some dark walnut stain to the stock to match it, but the plug is still much darker. From what I have been reading on the interwebs, oxalic acid is good for removing stains but only 2 part wood bleach will lighten the natural color of wood?
![[Image: gaah.gif]](http://img.photobucket.com/albums/v82/Highpwr/Smilies/gaah.gif)
The fit of the plug worked out beautifully with no glue line what so ever. But because of the color difference it stands out like a black fingernail on Edgar Winter's hand.
I tried applying some dark walnut stain to the stock to match it, but the plug is still much darker. From what I have been reading on the interwebs, oxalic acid is good for removing stains but only 2 part wood bleach will lighten the natural color of wood?
Willie