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Need help choosing paint color for interior of cabin.

I am looking into painting some plywood walls Alabaster or pure white and having the other part rustic with its natural color. Any suggestions -- should I paint all walls white or ...? I am planing on putting up trim in the joints-- there are some small gaps that need to be covered. I changing head board and getting a new smaller chair, new fan, lighting, small desk area and a trundle twin bed. the room is 25ft long x 10 ft wide with a kitchenette.