On a ride today on my Felt DA, not sure what caused it but I may have hit the front DR button (Di2) accidentally and dropped the chain which sucked up between the small rind and the BB housing where it meets the chainstay. After I got home and took the crank arm off I found a gouge from the chain thru the clear coat but not thru to the carbon fabric. It almost looks like a gouge / chip because some of the damaged area flaked away on inspecting it. The gouge is maybe 1/4" wide at the widest oint and about 1' long and maybe .015"-.020" deep at the deepest point.

I'd like to fix this but not sure what to use. I'm pretty sure it's just cosmetic but I still would like to fill the gouge. Do I just tape it off and build it up with clear coat or does this need an epoxy like fill first?