Dust the pine wood with a cleaning cloth or feather duster.
Mix a cleaning solution of 20 percent ammonia and 80 percent water in a bucket.
Dip a soft cleaning cloth into the solution and wring it out well.
Rub the cloth over the entire surface of the pine wood. This mixture is effective in cleaning soil or stains from the unfinished wood.
Mineral Spirits Method
Wipe off the unfinished pine boards with a soft cloth or feather duster to remove any dust or loose soil.
Dip a soft cleaning cloth into the mineral spirits or turpentine.
Wipe down the surface of the unfinished pine boards. This method effectively cleans greasy grime, oil, wax buildup and furniture polish from wood surfaces.