New answers tagged stairs
On the risers (the vertical part between treads) you can see a faint shadow of the same pattern. It looks like maybe there was once a "stair runner"; a strip of carpet or other material that ran down the middle of the stairway. Sand more, try wood bleach (oxalic acid) as suggested, then use a darker stain to blend. Finish off with varnish.
The answers of the tread then riser SEEM to make sense, but consider this: A properly installed tread will not come off before the lip breaks off. Using just regular Elmer's wood glue, I used to make treads by gluing the edges of 2 2x6 planks together and then planing and cutting them down (after being clamped for 24 hrs). After that, if I took a sledge to ...
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