My tan smart cover seems to easily attract darker grease marks on the leather..is there a coating of some kind people have used so that slight grease (as in extra finger grease from sweating/etc) does not mark up the leather? I have this: http://www.amazon.com/Kiwi-SELECT-Natural-Leather-Restorer/dp/B0010TJ9HU Will that work? It says for natural finished leathers. Also says for oil-tanned and waxed leathers. Does this include the smart cover? Any better ideas?