Theoretical question on stiff leather.
As some will know, I live in the tropics.
Unfortunately, after our "wet season" we then get our "winter" where it gets flamin' cold and the temp can drop to as low as 10c / 50f.
Most times, our humidity is above 70rh, and very often in the 90's for weeks on end.
So, come "winter" and everyone is pulling out their leather jackets 'cos they gotta go south for a while.
Naturally, these jackets are mouldy and in most cases hard and stiff.
They can be either pigskin, cowskin, suede and shearling.

I get all the "good" ones.

How would one treat the mould spores AND staining. ?
How would you add moisture back into these items to make them soft once more. ?
What product would you use to make them soft once more. ?
Looking for a system that is a "hands on" method of cleaning rather than a machine type clean.
I do realise that not a lot can be done for the pitting that the mould spores have created, apart from spraying colour onto the item.
There are many systems on the market, some good, many not so good.
I would like advice on the best system and products YOU would use to rectify these problems.
Thank you,
Shorty.