Oil pull-up leathers are generally thicker than other leathers. A scratch in an oil pull-up leather can typically be rubbed out with kneading or rubbing the leather alone. The oils are part of the leather. Wax is a surface coating on aniline leathers. It can be worn off in areas of heavier use. Wax On adds the coating evenly over the surface of the leather. Oleosa adds back oils to both the surface and internal parts of the leather. You may want to visit a leather furniture store and examine some of their samples to see more clearly the difference.
Protected and pigmented leather are generally easy to clean as long as the urethane/pigmented coat is intact. Aniline leather can be a bit more problematic. Nubuck and suede leather characterized by a nap should be declined until you have more training. There are also some newer type of poor quality leathers that are also problematic.
We used to do a full day leather class to discuss all of these issues with a lot of hands on leather identification and cleaning. It is hard to cover this adequately in a few paragraphs.
Protected and pigmented leather are generally easy to clean as long as the urethane/pigmented coat is intact. Aniline leather can be a bit more problematic. Nubuck and suede leather characterized by a nap should be declined until you have more training. There are also some newer type of poor quality leathers that are also problematic.
We used to do a full day leather class to discuss all of these issues with a lot of hands on leather identification and cleaning. It is hard to cover this adequately in a few paragraphs.