Aniline Wax Pull up Sofa Cushion – Failed Attempts.

There seems to be several products to resolve my problems but I need to understand how to use them better and become better educated on leather in general. Here is a picture of a leather wax pull up sofa cushion cover that I would like to discuss. Here’s the detail of my steps to remove the stains but here is what I attempted on the leather:
1. Put in washing machine with cold water and 1/2 cup acetone. Let airdry. Did not remove stains, did remove wax coating
2. Tried to dye with pigment dyes like full finish. Had to strip with acetone.
3. Tried to recover wax pull gloss by adding gloss leather protection cream. Darkened areas on cover and look splotchy.
The original color was dark but the seating area has faded due to wear and sun. Customer wants to keep the worn look. Leather is in good shape but now dry, not soft and supple.

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