Place strips of masking tape around the perimeter of the stained or discolored area.
Select a stain marker that matches the color of the existing pecan color on the furniture. Apply it to an area on the furniture -- the bottom of a leg, under the top or anywhere that's not visible -- to test the color. Check the color after the stain is dry. If it doesn't match, try a different marker until you find one that matches.
Apply the stain marker to the stained or discolored area marked off by the masking tape. Allow the stain to dry. Check the color. If it's too light, try a darker marker. If it's too dark, saturate the corner of a cloth with acetone and gently rub over the area to lighten it until satisfied. If it becomes too light, use another marker to darken it. Allow the stain to dry. Check the color and repeat this step if necessary.
Spray the area with a light coat of aerosol lacquer. Choose medium-gloss, dull-gloss or eggshell, depending on the look of the furniture's finish. Hold the can 8 inches from the surface tilted at 15 degrees. Spray the masked-off area until it's wet, but not dripping or running. Allow the lacquer to dry.
Sand the area using a folded piece of 180-grit sandpaper. Brush it off using a dry cloth. Apply another coat of lacquer. Allow the lacquer to dry and remove the tape.
Polish the area using a folded piece of denim. This is also known as burnishing. Simply rub the area with authority until the wood becomes slightly warm to the touch. This blends and smooths the lacquer to conceal any differences.