Sugarhouse walls
The trouble with linseed oil is that it darkens almost to black over time. I think Tung oil would be a lot better if you want to keep it natural colored.
I'm hoping to get my sugarhouse built this year (and get the evaporator out of the tractor shed), and I'm going with some used aluminum roofing that I got for free, painted white. Dim surroundings make me sleepy, so I;m putting in lots of windows and fluoresent lights.
To control steam & condensation, instead of a steam stack or coupola, I'm putting in a huge squirrel cage blower. I'll have to let you know how it works out.
Tons of trees. No taps, No evaporator
No wife, No Kids. Nothing left but Dreams