I am attempting to clean the driver’s seat of a 2013 BMW.
The seats are ivory white.

The big problem is a brown stain low down on backrest of the drivers seat.
It has come from a new leather belt I was wearing; the dye seems to have transferred onto the seat.
It has been there for probably 2 or 3 months, I'm hoping it isn't now too late to do anything with it.

None of the leather cleaning products I have tried has ever made any difference to it.
I'd been using BMWs leather cleaner, available in their showrooms, this product had otherwise been great at removing everything else, including dye transfer from blue jeans.

Here is a view of the seat
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A close up
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I also wanted to deal with this one on the side bolster, no matter how much I clean it, those dark lines remain at the creases. The creases have arisen from just getting in and out of the car.
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I encountered your product when doing an Internet search for removing leather on leather transfer, I found this post and concluded it was the same problem. I was intending to follow the same instructions, i.e. leaving the Prep 7.7 on overnight.

http://www.autopia.org/forum/topic/1...al-kit-review/

I hope I have ordered the right products?