On part of a frame I'm making with some 180yr old heart pine the waterlox finish seemed to darken to a greyish finish one part of the sap wood. There was alread a black spot in that area you can kind of see in the picture so I'm not sure if my attempt to sand that out ended up spreading it out more in that area and I just couldn't see but it ended up reacting with the finish. Question is, is there anything I can do to take that dark coloration out? I've just put the one coat of finish on.
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