I found a great video demonstrating the repair of a carbon fiber composite panel. The is is a carbon fiber reinforce epoxy structure that needs a localized repair to the core material. This repair uses a vacuum bagging process to help maintain a high-quality laminate.
The video is sped up to quickly demonstrate the overall process required. This process requires a high level of attention to details, as they are very important. Training and experience are necessary for good results.
Chemical adhesion between all of these layers will create a bond that is durable and suitable for restoring strength back to the structure.