Quote:
Originally Posted by geoff2010
It isn't plastic... its carbon fiber under the clear coat... perhaps I misread your statement?
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The roof is CFRP which is a composite, just meaning a material made of multiple materials. The carbon fiber strands are woven into a fabric and the fabric is stabilized into a solid with epoxy (glue). Cured epoxy is generally considered a plastic. However there is a lot of CF and not so much epoxy in a good grade of structural CFRP and the carbon is really hard as well. The key thing to making the system durable is a good grade of CF, good epoxy that cures hard and dense as well as offers significant resistance to environmental aging such as yellowing, common with cheap composites. Of course the clear coat is important as well but the same stuff used for the rest of the car should be fine here.
Whether or not a key or somthing similar, if used in a very aggressive fashion with intent to casue a lot of damage would damage the CFRP roof more or less than the SMC composite fenders or steel door is a big TBD. Let's hope we see NONE or very very few example pics posted here of such CFRP roof vandalism.