Back when Cuetec first introduced coated shafts (fiberglass?), they had a nice, shiny finish. They were also sticky and impossible to play with if you used a closed bridge. The solution was to sand them and make the finish dull. Eventually, Cuetec started doing this at the factory, which they should have done from the start.
It is counterintuitive, but for a stick to slide smoothly on the skin of your hand, you want a slightly rough surface and not a smooth one. That's why the OP has a problem now that his shaft is shiny from wear. And that's why chalk dust is really bad for CF -- it is slightly abrasive and polishes the surface just where it needs to be a little rough.
