All of these products are easy to find. The four-star and pinnacle are available from premiumautocare.com. The Deep Down leather cleaner is available from TOPOFTHELINE.com, and the Leatherique is available from Goodspeedmotoring.com. As far as process; First vacuum the leather with a brush attachment to get all the loose dirt. Make sure you vacuum/brush well in the seams. Second, dilute some leather cleaner, such as Deep Down, to the proper concentration. Spray the cleaner liberally on the seats, and use a horse hair brush to scrub the leather. Rinse with a microfiber towel wetted with water. You may have to repeat this step if dirt remains in the cracks and crevices. Third, once the leather is dry, wipe on your conditioner. A foam applicator pad or your hands work well. Allow the conditioner to soak in the leather. Fourth, after the conditioner has soaked in the leather, buff with a soft dry cloth. Well, that is my routine. It produces great results for me. Oh, most leather these days is coated with some type of vinyl or plastic based coating. The above mentioned method will work with this type of leather.