I just built a timber staircase from newly sawn pine. The timbers are 4 X 12
so they will take a long while to dry. Some spots of blue mould have
occurred on the rough lumber but I have stopped it with water and powdered
chlorine for pools. It is all sanded and I want to know what I can put on
the wood that will prevent the mould from starting again but also allow the
moisture to escape. I assume polyurethane or varnish will trap the moisture,
what about an stain, shellac etc...
Indoor or outdoor ? It'll be hard to guarantee freedom from blue stain
if it's getting rain on it, whatver you do.
I'd use some generic danish oil mix on it - linseed oil + varnish and
maybe something to thin it. For outdoor use (benches, tables etc.) I'm
liking the Australian "Organoil" range.
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