We are in the process of cutting a white pine timber frame, and despite our best efforts mildew and blue stain have tarnished our timbers. We have bleached and then sanded the beams to try and stop new growth and minimize the appearance of the stain. I suppose there is not much we can do at this point, but does anyone know any way to reduce the stain once it's there?

One other question - we recently raised and enclosed a timber frame barn, and to treat the beams we used sanding, a mixture of half bleach/half water, then finished them with a mixture of half linseed oil and half gum turpentine. Now, about 5 months later, we are noticing some brown stains that look like water marks. We think it might be from water in the beams coming out (they weren't completely dry). Anyone seen this before?