Introduction
This will result in extending the life of a product known to succumb to the elements, often needing replacement when not either protected or maintained. Wood is highly vulnerable to the elements, and instead of replacing a wood railing that is in decent condition, (something to be more of an eye sore) it can be nailed back into place if falling, sanded down to a healthier layer of wood, and stained/painted to protect it from weather for years to come.
Tools
Parts
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            First, you will want to prep the wood railing and surrounding area. 
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            You can use a hose to rinse, followed by a cloth if needed. Let the wood dry before proceeding to next step. 
 
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            Next, you will want to secure the wood railing and its structure. 
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            Hammer any nails that are loose. 
 
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            Fill in holes for both nails and wood imprfections/damage. 
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            You can fill holes with an exterior wood filler. Simply just use your finger or a putty knife. Fill space completely. It is okay to have excess, as you will sand it in the next step. 
 
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            Sand the wood and the areas where you used wood filler. 
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            Take your sanding paper or sanding block as shown, and sand the wood in a circular motion. 
 
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            Once sanded, you will want to clean the entire wood railing with a damp cloth, or hose and cloth again if needed. 
 
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            Lastly, it is time to paint or stain your railing. 
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            You will want to pour your paint or stain into a paint pail. This will make it easier and more efficient when using a paint brush. 
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            Take your brush and do short-to-medium strokes in the direction of the wood grain. This will provide a smooth application. Your paint strokes should go from left to right, or right to left. 
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            Once all of the wood railing has either been painted or stained, you are done! Let dry for a couple of hours before touching. 
 
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In conclusion, your wood railing is now protected from the elements, AND, looks amazing! For cleaning you can wipe with a damp cloth, or water hose. You can touch up the wood railing with the paint or stain if needed.