Carbon or just paint damage?

Remove the paint so you can properly look at it. The flaking paint can change the sound too.

Thanks for your post on r/bikewrench. The only type of post accepted here is questions, as per Rule 3:

Unless your post is a question or advice about bike repair, it doesn't belong here. We don't need to see pictures of your latest build, or that funny bike that rolled into the shop. There are other subreddits for that.

The sidebar lists other subs to consider: r/BikeMechanics is suitable for almost anything you might want to post here. Also consider r/JustRidingAlong, r/BikeBuilding, and r/xbiking.

We hope you will repost to one of those others, or if you meant to ask a question, please repost here with your question clarified.

Thanks