What might help is the product I'm now testing to minimize rubbing on the high, sharp seat bolsters. It's "Leather Scent-S," from Leather Doctor.
The product description is a bit unusual, but Roger Koh, who sells (and, I think, manufactures) this product along with many, many other leather-care offerings (the proper choice and application of which would require hours of study), told me it will work.
Here's what he says about it:
"Leather Doctor®
Leather Scent-S
It’s for Pure-Aniline, Nubuck, Suede, Hair-On-Hide and Woolskin leather types.
This is a non-film forming, non-stick rub-resistant protector that enhances a natural silky-feel with a classic leather scent.
It imparts a non-stick surface essentially to shield the detrimental effects of sticky soiling including the nasty ballpoint ink.
And it does help to release those tenacious dye-transfer stains especially on light colored leathers easily without resorting to unnecessary color refinishing.
Its natural silky-feel protection increases the leather resistance to wet and dry rubs, thus reduce stretch, scuff and abrasion.
And it reduces friction squeaks that wear the finishes when leather is rubbed against during movement.
This product is also available in concentrate to be cut with distilled water at a ratio of 1: 9½.
Thus a 120ml bottle makes 1.39 quarts of Ready-To-Use product to save on shipping.
Ready-To-Use packing sizes are available in 250ml and in Quart.
Concentrate packing sizes are available in 120ml (1.39 quarts), 250ml (2.77 quarts) and in Quart (10.5 quarts).
Email
info@leatherdoctor.com for prices.
Note:
To reduce sheen and scent add Silky Feel-43
Instruction:
1] Identify, inspect and dry soil removal prior to application.
2] Shake well, fine mists spray on cleaned surface (airbrushing is preferred on nubuck to avoid spits).
3] Groom nubuck with Nubuck Brush-2 for a “finger writing effect”. "
The only things I can say about it for now are that it doesn't change the feel or appearance of the leather and that it smells good, if you like the smell of leather.