I have found Ceracote more of a joke than anything else. A rifle with Ceracote applied by a highly regarded smith had spots worn through it on a short Kodiak bear hunt... just from rubbing on the raft tubes.
I've found Brownell's "Aluma-Hyde" to be about the same. The crown and bolt handle of one of my hunting rifles are worn to the steel, and that's just from the time it's spent riding in a case.