How do I finish knotty pine plank walls?

Cindy Kunde
by Cindy Kunde

We moved into a home that has knotty pine tongue and groove walls and ceiling in the family room and hallway. It is rough and needs to be sanded. What is the process of finishing it? Obviously sanding and what kind of sealer / varnish ? I don't think I need to stain it - I like the natural color.

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