New answers tagged carpentry
It doesn't matter unless the room is going to have an extreme amount of humidity, temperature changes, or was subject to a lot of chemicals. What you are worried about with a ledger is warping or the bolts rusting. If I wanted to protect a piece of wood from elements I would use an oil based primer and paint as I would use in a bathroom.
A true wood stain does not build a "film" on the surface. It only changes the color of the porous wood fiber near the surface. You will want a film-forming finish if your goal is to make it easier to clean up spilled liquids. A paint will do this, but if you want to preserve the look of the wood, then 1 to 3 coats of a polyurethane based finish will also ...
Stain or paint - whatever suits your fancy, or colour scheme. :)
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