OP: If your going to paint over the CF I would just recommend you get an FRP Front Bumper because CF will still get chips and gouges no matter what. You should probably get a clear bra next time you paint. I currently have a full Carbon fiber front end on my Z and a majority of my car is CF. I did paint this cf bumper but I also have another in full cf too.
I get lots of compliments and looks with CF (majority from the popo) but I am getting tired of the look so I'm gonna be paint scheming the whole car pretty soon. The thing with CF is that if it is not prepped right, you can tell that the piece was cf that was painted. Dry carbon is actually much harder to prep because the weave will definitely show through if not prepped right. I'll post up a whole thread about carbon and the differences and such soon. I want to get you guys educated on some of the products that are out on the market. As far as price goes, currently for the 370 your looking to spend 1000k plus for just the front in CF.
We actually are having the Zele replica kit coming in pretty soon here, about less then a month. We also will be making the full Nismo replacement body kit (not the lip and add ons) in FULL CF Made to order.