I'm building a 5x10 profile trailer that is 6ft wide. I've had a hard time deciding what to seal the exterior wood with. I'm not planning on skinning with aluminum or anything just painting the 3/4" Baltic Birch exterior wall. I was going to do the PMF method but my experiments on a few smaller boards with 8oz canvas drop cloth didn't leave me with the desired smoothness that I want. So I'm back to sealing with epoxy resin and painting over the top of that with latex paint.
I'm curious as to how much I would need to buy on a build like mine? 1 gallon? Less or more? I have no clue. Also what's the best way to apply it to get the smoothest finish? Foam roller? Brush or 1/4" nap paint roller? Also if someone can point me to a link for the exact epoxy resin I need to seal the exterior it would be appreciated. Thanks for your help.