Originally Posted by
ctpres
My CF bike damaged twice. Once when carrier clamp can loose on 1,000 mile trip and wore thru top layer. Next bike carrier latch failed and lost bike at 40 MPH. Both damaged area looked BAD. I finally stopped crying and patched both damaged areas with nail polish. Couple thousand miles later and nail polish still looks good and frame is still solid and rideable. Note both bike carrier failures were operator error that will NOT happen again.
Uh-huh. Nail polish will "fix" a scratch, but what the OP's picture showed is structural damage in a pretty highly-stressed area. IMO, it requires evaluation and repair by someone who knows composites.
FWIW: the carbon-fiber frames I'm familiar with typically have an outer layer that is decorative and/or protective. This can be either a light "veil" cloth or just epoxy. Wearing through or damaging this usually won't compromise the frame.