I'm bringing up an older post.
I have similar issues with my white pine frame. I just couldn't get my roof on quick enough. Rain water got into the bottom of the posts and turned them black. It was beautiful weather during the raising and unfortunately I did not remember to put Anchor Seal on the fresh end cuts at the bottom of the posts.
Will the methods/solutions mentioned in this post also clean up the bottoms of my timbers. Also, if a bleach solution is used will it leave a strong smell in the pine timbers or does it dissipate after awhile?