It's a known issue, many have already mention this problem.
My rear menu thumb control lettering wore off after owning the camera for less than two months.
You can send the camera in and have the panels replaced with new ones that are "supposed" to not wear.
I just got mine back from Sony after the paint started wearing off in less than two weeks! Unfortunately, they broke my Ch. 1 audio circuit when they put the new plate on. It's back at Sony now having THAT problem corrected as well as replacing the lens.
