Choose oil or stain products that contain water repellent, ultraviolet light blocker and fungicide additives. Purchase a high quality penetrating oil, penetrating oil-based semitransparent stain or non-penetrating latex semitransparent stain to treat your cedar wood.
Sand your cedar wood to a smooth finish using an electric or manual hand sander. Wear a face mask to avoid breathing in cedar dust.
Protect surrounding surfaces from accidental drips of stain or preservative by laying down cotton or plastic drop cloths.
Apply oil or stain to your cedar wood using broad, even brush strokes. For best results, use a high quality, three- or four-inch wide paintbrush when treating your cedar wood. Apply two coats of oil or stain to your cedar wood. Allow the wood to dry completely between coats for best results.
Retreat cedar wood treated with penetrating oil products every one to two years. Retreat cedar wood that has been treated with oil-based or latex stain every three to six years.