Various finishes applied to automotive leather - Blogs - Autopia.org

a) Finished leather -
unless a Premium Leather option was purchased the type of leather upholstery used by 95% of OEM is a multi stratum covering over the leather hide; the top strata is the surface pigmentation (colour) and an abrasion resistant urethane.
b) Covered leather –
see (a) above
c) Pigmented leather –
a spray-on colouring applied to a leather surface. More often pigmentation is applied to a urethane, which provides an even colour to the upholstery as well as abrasion resistance
d) Aniline (more correctly Micro Pigment) –

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Hydration of Finished Leather - Blogs - Autopia.org

Leather naturally absorbs and retains moisture vapour, meaning it’s also susceptible to losing the moisture necessary to keep it pliant and soft. One of major attribute is its ability for transpiration (allowing the movement of moisture back and forth (evaporation and hydration), which it does even better than wool. This means not just its permeability to air but its permeability to water vapour, on the other hand, whilst it absorbs water vapour it doesn't readily absorb liquid, so a light rain will not harm it and a damp cloth can be used to keep it clean, however the introduction of any solvent-based products accelerates aging of the leather.

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Automotive (Finished) Leather Upholstery - Blogs - Autopia.org

There is a great deal of conflicting information on leather care being put out by leather experts themselves who use baffling pseudo scientific techno speak as another marketing ploy, which makes it difficult to find a definitive, unbiased answer. Here is one definitive truth –you are dealing with the leathers finish, not the hide itself.

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