I just spoke to a lady at Shep Mallet,and she said not to use cream on darwin as it will stain it darker,its only a tanned leather and has had no surface treatment so thats why they recommend spray.
You can use collinil spray on glove leather,but its best to use cream.
Collinil should stop jeans staining oak darwin if its properly sprayed.
Two to three months is recommended for re-treating with collinil on Darwin bags.
I asked about the Hanover as both Sarajane and I have a paticular interest in this one,she recommends nothing other than cleaning with a soft damp cloth as the leather is already treated with something.
The nourisher is £9.99 and can be ordered from them.
I am also of the mind that darwin may need something to keep it supple,but the only ones I have that I put cream on are choco,and I suppose you would'nt really notice a color change,Sarajane help!!!!
Now I'm not sure about the havana,I think I am most definately with Sarajane on this one.The leather feels too delicate to do nothing with it at all.(I went to Cheshire Oaks and had a peek)
I can feel some more scientific experiments coming up,but I need a new camera,Sophie fished mine out of my bag and posted it through the cat flap, when it was raining....................................................