Summarize:

Polish the leather by applying the cream over the filler with a shoe dauber or cotton cloth. Work the cream into the leather in a circular motion. Shoe creams polish and add color to leather, so make sure you choose a color you don't mind wearing. Try to select a cream that matches the color of your shoes. Creams work very well on repaired cracks, but you can also use them to color the rest of the leather. Use a cotton or microfiber cloth to restore the leather back to its normal state. Starting at the top of each shoe, rub the leather with small, circular motions. Buff both shoes equally to get them to look the same. Make sure you treat all parts of the shoe the same way so the leather looks uniform all over. Check the shoes again to see how they look. With proper treatment, the cracks will no longer be visible. Use more filler, cream, or other products as needed. A great time to start conditioning is after you finish with the repairs. Use a clean cotton or microfiber cloth to avoid working dirt into the leather. Apply the conditioner in a thin, even layer by buffing the leather with small, circular motions. Work on one part of the shoe at a time until you have it completely covered. As an animal material, leather needs regular oiling to prevent it from drying out and cracking. Regular conditioning also masks old cracks and prevents them from reappearing.
Use a shoe cream if your shoes look discolored. Buff the shoes with a clean cotton cloth for 4 minutes. Treat your shoes with a leather conditioner once a week.