Unscrew all of the handles and remove them from the cabinets.
Use ordinary dish soap and cloth rags to clean the cabinets. Rinse them and wait approximately 2 to 4 hours for them to dry.
Sand the cabinets with a palm sander, equipped with 220-grit sandpaper. Sand along with the cabinet grain of the wood until the finish appears dull.
Eliminate sawdust from the cabinets by wiping them with tack cloths.
Apply professional painter's tape to areas adjacent to the kitchen cabinets. Cover your floor with drop cloths.
Brush on a coat of oil-based stain, using a paintbrush engineered for use with oil paints. Wipe excess stain from the kitchen cabinets, using clean cloth rags. Wait 4 hours for the stain to dry.
Wash the stain from the paintbrush with mineral spirits.
Brush on a coat of varnish or polyurethane wood sealer using the cleaned paintbrush. Wait 4 hours for the finish to dry. Skip this step if you'd like the wooden cabinets left unvarnished.