Smooth the leather out if it is a bit rough (you can use wet/dry sandpaper - clean the leather off afterwards). One problem with putting CrO2 on the back is that you might get a slight contamination or the strop may leave smudges on whatever you have it hanging on. Otherwise, I would think it would be fine.
Originally Posted by Clovis Man
Inventor of the world's first safety vibrating Kamisori with night light. Go to http://badgerandblade.com/vb/showthread.php/299465-A-milder-Kamisori: Inventor of the Weckisori - (thanks sychodelix)