Looks great as is. Leave them alone.

Mix 1 part lemon juice and 2 parts olive oil (or some folks use almond oil) and polish them. See if this gives them a little love. You will not get rid of the orange tone, but you will feed and shine them up. The orange is simply part of the aged pine, and they look fabulous. I have a waxed, solid cherry island that was my mother's and this mixture cleans and shines it without damaging it. Make sure you polish it off though with a cotton rag, so it doesn't get sticky.

This is not something that can be determined from a photo especially with no information about the existing finish. A simple mistake could be disastrous and I doubt you would like a "bit of shine".

@User Wrong. Been doing it for years. Don't buy into the consumer mentality.

If you have the budget, leave the plank ceiling and replace the walls with drywall and paint. Too. Much. Wood.

Wow, I believe that the wood looks great.

It probably has a laquer finish on it. And yes they do loose their luster.

A new topcoat of laquer finish wood really wake it up again and help restore the luster.

I identify luster as described how wood can reflect the sun in different directions making it glow per say.

A new topcoat will also help keep the UV sun rays away. And make cleaning easier. Just wipe down the walls once in a while.

I would recommend Deft brand because it's what I used when I had my woodworking shop. Just wipe down your wall with a warm water rag. Apply. Comes in a waterborne so no odors. Dries fast. Apply with a foam brush and throw the brush away. Cap the can, you don't have to do it all in 1 day.

If you don't like it you can do something else. But a nice finish on beautiful wood will always be a wall that is different.

I suspect that the total cost to finish this room would be under 300 $.

I would give it a chance

Beautiful walls (drywall should not be an option). Like mentioned, we can't tell what's wrong from the photo. It looks fine from here!

First find out what your finish is and go from there. Some are easier to freshen up than others.