The epoxy might not bond that well to aluminium due to the instant oxidization (maybe there are some special primers that help) but the carbon will act as a cast and stay tight on.
Not long ago here on WW there was a thread on some sort of carbon-aluminum bonding, and Damon Rinard chimed in with suggestions to deal with the instant oxidation. I wish I could remember what thread it was, as I think he mentioned a "proper" way of doing it, maybe with some sort of chemical treatment that will remove the oxidation and prevent recurrence, but I do clearly remember the "hack job" method he referenced complete with disclaimers as to results may vary. He said you can coat the stripped aluminum surface with a long cure time epoxy and then wet sand through the epoxy, which will remove the oxidation layer. Then the hope is that the thin layer of wet epoxy will be acting as a protective barrier to prevent recurrence of the oxidation. You can then cure that epoxy, and for the next step, be doing a less sensitive epoxy-epoxy bond, with reasonable assurance that that your base coat has good adhesion.