Italsofa - 10yrs old Bicast sofa, ottoman and chair – has a sticky film due to body oil, sweat, etc.

[Questions!]

Italsofa - 10yrs old Bicast sofa, ottoman and chair – has a sticky film due to body oil, sweat, etc.

I'm looking to refinish a sofa, ottoman, and chair that has a sticky film due to body oil, sweat, etc.
The furniture is about 10yrs old and it was purchased under the brand Italsofa (I think the lower end of Natuzzi) so I don't think it's a bi cast leather and I haven't seen any peeling or cracking.
It seems to be the type of leather that if scratched with a fingernail the discolored area eventually fades away.
It's uniform in color with a textured look and dark brown in color.
Under the ottoman I found a small exposed piece of leather and the backing looks like standard hide of some type.
Is there anyway you can help me determine what type of leather this might be in order to purchase the correct restoration kit? And let me know how much I need to finish the pillows and backs on a chair, sofa and the top of the ottoman?

Regards,
Jack Roy


#1 - IMG_1538 - The narrow darker brown area in the middle is the back of the leather



#2 - IMG_1533 – close-up ottoman surface, not much damage



#3 - IMG_1534, 1535 – close-up worn sofa surface



#4 - IMG_1537 – sticky section



Here’s a few more pics.

#5



#6



#7



#8



What do you recommend I purchase?
And how much of each to do 1 chair, ottoman and sofa?