I bought a big chunk of heavy leather to line my vises. In the past I only had some rather lightweight leather available, and a rather small amount of it. I just used some spray adhesive to attach it to the outer face and left the inner face bare wood.
My question is, would both faces be better? I don't know about grip, but I would think putting it on both sides would be easier on whatever I happen to be clamping.
Also, is 3M 90 a good choice for an adhesive? I think I used 77 with the lighter leather, but I now have a can of 90 on hand.