Hello, I recently acquired a DS-42 sofa (photos below). I believe it to be made from bull neck leather. It's quite thick aniline leather with natural color. While I don't mind some patina, the original flat light tan color of these is lovely.

There are a few things that I'm interested in doing the following:
1. To whatever extent is possible, lighten what appear to be grease or body oil stains. Trying go achieve the original light tan (currently visible on sides & back).
2. Remove what smells like old cigarette odors.
3. Remove the shiny, waxy texture on the seating surfaces, and protect. Again, the sides and back have a very supple, flat/matte finish.

Thanks

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