You have many choices. The color and finish determines the best product for this application. If painting, a stain blocking acrylic primer and 100% acrylic finish paint in flat or with a satin sheen is best. If staining, you can use semi-transparent oil stain if the color, grain and texture of the wood is important; or a latex solid stain if an opaque finish is desired. No primer with either stain products. You have to decide what color and finish is desired, then the best assistance to match that desire is available at the professional paint stores (i.e. Benjamin Moore, Sherwin Williams; Kelley Moore etc.) Don’t forget to ask for preferred customer discount card, usually good for about 20% off retail.