Mine were disgusting. Shocked this is the only post I could find about them. I think because I'm also F23 and the sun from top down is what does the damage just to the handle.
I just put on some "Cerakote Ceramic Trim Coat" which is clear but made my handles look black again and leaves a coating to protect in the future. So far after an hour they look great, if they fade again will report back.
Before and after:
