Remove the old finish. Protect the porch and surrounding surfaces with newspapers or drop-cloths before applying any product to the rocker. Use a chemical stripper to remove all the stain or paint on your old rocking chair. Follow the directions on the label. Use a small wire brush to reach any cracks and crevices. You may need to use more than one application to remove all the old finish. Allow wood to dry thoroughly.
Check all surfaces of the chair for dents, cracks or holes. Fill these with wood filler and allow to dry. Buff all surfaces with a fine-grade sand paper. Avoid rubbing too hard on softer woods. Do not take any shortcuts in the sanding process. A good sanding job allows the paint to adhere closely to the wood. This will help you to avoid chipping and peeling of the new paint. Use a soft brush or dry cloth to gently buff away all dust and particles.
Hard woods will benefit from a good quality primer before applying the actual paint. Softer woods are more porous and do not require a primer, but using one can provide an extra layer of protection. Apply the primer according to the directions, using a nice, soft bristle brush for even coverage. Avoid pooling around ridges and corners by taking your time applying the primer in these areas. Allow your primer to dry completely. Check for any drips or thick areas. Sand these even with the rest of the surface before applying the paint.
Choose the type of paint you will be using. There are many different kinds of paint and finishes available for wood furniture. Make sure you select one that is specified for outdoor use. Acrylic paints will provide a variety of colors at a minimal cost. Lacquer paints are commonly used in commercial finishes for outdoor furniture and will give you a rich, polished appearance that will stand up to the elements. Choose a water-based exterior paint if your rocking chair is in an area that does not receive much sun or exposure to moisture.
For the best results, use a sprayer to apply your finish. A sprayer gives an even coat and is less likely to drip or pool. Most hardware stores offer small sprayers that work well on furniture projects. If you decide to use a paint brush, select one that is labeled for use on wood surfaces. Don't hesitate to pay a little more for a good quality brush. A cheap, poorly made brush can streak and shed bristles, ruining the look of your rocking chair. Depending on the look you desire, you may need to use two coats of paint. Gently buff with a very fine-grade sand paper in between coats. Allow to dry, then sit back in that comfortable old rocker and relax. You earned it.