"A lot of body shops won't even realise that carbon hoods are coated with a different clearcoat than the rest of the car. Its more elastic because cabon fibre expands and contracts in heat/ cold. Don't use abrasives or you get a "bruising" or "shadowing" of the clear, especially by hand. I wouldn't even let a body shop use a mild abrasive on it.

Use a cleansing wax, very gently by hand. Best is Klasse All-In-One because it has no abrasives but perfects the paint brilliantly. Otherwise try Super Resin Polish by Autoglym or the Zymol Paint Cleanser (the blue stuff made by Turtle Wax, not the real expensive Zymol). Work the product in straight lines going from front to back of car, not side to side. Work a small area, but don't let it dry to a haze completely. Give it a light buff as you go, then give it a good buff with a micro-fibre towel." Keith-Racershaven.com

this was posted on a forum is used use before racershaven.com. remembered it so just searched and it was still there. hope its of help.