The CALL and END buttons on the Hero apparently wear off, to the point of showing just solid green and red buttons. Rather annoying. Has anybody found a viable solution for this without going for an Otterbox Defender case? The full skin kits seem to have a cutout for the buttons, leaving them exposed. I'm curious to know if anybody has tried creating their own cut-outs from screen protectors and applying them over the buttons. Also... I've been thinking about perhaps trying a matte clear nail polish, to prevent this wear from happening. Thoughts?