I've got some leather I'd like to try to make a few strops out of. I've had this stuff for ages, and I just figured I'd eventually run into a material of some sort I could glue it on, and presto, I've got a strop. This hasn't seemed to work out. My trouble is I'm worried about getting something that's suitably flat and that will not warp. This has made me rule out the wood in my hardware store. Strops I've bought in the past have come with a flexible rubber backing that seems to work ok, but I haven't been able to find any of it around either.
Anyone have any ideas on a substance I could use, and better still where I could procure some?