I bought a carbon roof, overall condition is okay, just some minor set back that is not noticeable in a few feet.  Up close you can see 1 large crack on the side, and small ones all the around the roof.  My problem is the long crack, it seems like it has gone through all the way down to the carbon itself.  Is there a way to fill the crack?  Do you just sand it and hope the clear coat can get through or do I need resin?  How do you spray the clear?  Do you sand first, then buff, then respray the clear?  Here are some pics

LONG CRACK







Here's a sample of the crack that goes around the roof.  Seems like these are sandable then buffable





Here's a big crack but I believe weather trim will cover this part but might as well fix it.

This is a CF roof available for BMW E46 M3.  This is an aftermarket made my VORSTEINER.  I'm planning on removing my current roof with sun roof and replacing it with this.  Crack started because I think the previous owner installed it wrong and it wasn't caused by an accident or weakness of the roof, more like because of the installation.