Hi there
Im in the Uk and am too just starting on seats.
I work with shoe repairs and will be using what they call in the trade 'micra' it comes in loads of thickness's and can be easly shaped using a sanding wheel attatched to a drill, or if you have a nice shoes repairer (like me ) they mit let you use there finishing machine you can get a super smooth finish and bonding the layers is real easy with neoprene glue, used for leather soles and rubber soles on shoes .
hope this helps and hope to get into a Uk network of leather works
great site
cheers shaun