I would like to get a seatpost rack for when I use my bike for commuting. However, I have a carbon fiber seatpost, and a bike shop employee told me that you should not use such a rack with a carbon fiber seatpost. I have also found this advice by searching on bikeforums.net. However, I have discovered that my seat post is actually a carbon-wrapped seatpost. This leads to two questions:
1. Are all carbon seatposts actually carbon-wrapped seatposts?
2. If carbon-wrapped seatposts are different than carbon seatposts, is it okay to clamp a seatpost rack on it.