I don't know about the Madone specifically. I do know that most of the molded "monocoque" carbon frames do get a cosmetic overwrap so they'll have that distinctive carbon fiber pattern that we all expect to see.


Couple of suggestions...

Post a photo of the scratch, and see if any of the really knowledgeable frame guys on this forum can give any advice.

Or, go to the source. Contact Trek customer service, and e-mail some photos to the tech support person that they give your case to... Believe it or not, they're going to care about this. Dig up that bike's manual, there will be some contact info in the back... Or, have the bike shop folks do the foot work for you.