Orval Fairbairn 
shared these priceless pearls of wisdom:
-Nope -- carbon fiber is a conductor and behaves similarly to metal --
Sorry, Orval, that just ain't so.  I've done some preliminary work with carbon
fiber and at most frequencies below VHF it isn't a conductor and it isn't an
insulator.  It is a great big resistor.
-especially if you have parts of .25 wavelength. Remember -- Edison's
-first light bulbs had graphite filaments.
Nope.  Linen threads dipped in carbon black.  Hardly graphite.
-
-Do not let carbon parts touch aluminum, as the aluminum will corrode
-from electrolytic action.  A carbon fiber plane will act as a ground
-plane for antennae, too -- as long as you have good electrical contact
-with the fibers.
That isn't so.  Please don't spread misinformation unless you've DONE the tests
and can publish your test results.
Jim
Jim Weir    (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST   Pres. Cyberchapter   EAA Tech. Counselor
http://www.rst-engr.com