I have a few but nothing like that, yours to me look like splitting rather than
scratches, a number of years ago I knew a fella who was putting cream on his
hands for some reason and his wheel looked similar to yours, turned out it was
a reaction of the material on wheel to the cream, I suppose your hands could
sweat while holding the wheel, maybe your wife uses cream on her hands,
could even be a bad patch of materrial on your wheel, if you are still under
warranty go for a new wheel.