What I was discussing is not a sandwich. It looks like al alloy. The fibers are contained in the metal.

Al carbon sandwich is another story. I general it does not work well. They delaminate. I have tried it and I have a Marstrom Al/carbon rudder crossbeam. The results are the same, delamination. M&P handbooks list 2 problems. Unstable surface on Al. The Al oxide surface finish forms over time and the epoxy bond breaks. Also there is a problem with the difference in stiffness and response to load unless the Al is foil thick.