If you go to the Horween website they show the process of makeing cordavan leather. Once you see the process you will know why it is so exspensive. Cordavan is not the hide it is the membrane that attaches skin to muscle there fore it is called Shell Cordavan. They shave the outer shell to reveal the mebrane. It then goes through a process of oiling and burnishing like no other leather. It is extremly polished does not scuff easily and that is why shoes made of it are extremly exspensive it just does not wear out. You could say tough as a horses ass cause thats where it comes from.If you have a true cordavan tab I don't think any thing will get it slicker it all ready is slicker than any thing else leather wise. As far as anything with a wax in it that will hender slicknes and wax gets sticky with any kind of friction. I would say caranuba wax might be good it is exspensive and is in car wax and is sold in liquid form from Feibings leather care. I have used Feibings caranuba wax on products and it leaves a nice slick finish it dries hard and is not sticky. I think thats why it is used in car wax its very slick rain slides right off and beads up. Any thing with BEE'S WAX will be sticky and Montana Pitch Blend has plenty of bees wax. I still beleave any thing you do to your tab is just goig to be maintance getting it slicker I dont think will happen.