Pour 1 gallon of very hot water into a bucket.
Add 2 tbsp. gum turpentine and 4 tbsp. boiled linseed oil to the water in the bucket.
Put on some heavy-duty rubber gloves. To be effective, this solution must be quite hot.
Dip a cleaning cloth into the solution and wring it out well.
Clean all of the knotty pine wood surfaces with the cloth. Make sure that you rub the cloth along the grain of the wood. Dip your cloth into the bucket often and wring it out to effectively get rid of all of the smoke residue.
Buff the knotty pine surface with a dry, clean cloth. Polish the furniture with lemon oil or a furniture wax, if desired.
Clean the knotty pine wood surface to get rid of any smoke odor and residue. If the odor remains, you will have to seal in the odor by painting the wood surface.
Mix 1 lb. of baking soda with 2 or 3 gallons of hot water. Pour the mixture into a clean spray bottle and mist the wood surface with the spray. Allow it to dry.
Pick a color of paint to seal the knotty pine in. Use a gloss or semi-gloss paint; it will seal the wood effectively, unlike flat paint, which can be porous.
Paint all of the knotty pine surface with one or two coats of the paint. Allow each coat to dry between applications.