Another choice that I have personal experience with is the Duracoat application via the "shake and spray" two part kit. Brownells has it for $60. No equipment is necessary other than what comes in the kit. I use it for finishes on inexpensive Turkish and Russian single shots.It is a two part epoxy finish. Five years ago, I was asked by a friend to take his gun to a gunsmith I know who specializes in turkey chokes. He had an old Lefever trap gun in 20 ga. that had already been reblued at one time with what turned out to be a plum finish on the action. I was in the process of Duracoating the action of one of my guns which had a bright polished alloy action. It was a small job and I had plenty of the mix left over. I offered to coat his gun once it was back from the 'smith. A screw in choke was threaded after cutting off the Cutts and a red dot mount added. The Duracoat was flat black. Here's a photo of the finished job. Now is Duracoat as tough as Ceracote? No. But Ceracote can chip and like Duracoat, repair is difficult if at all possible. Gil

[Linked Image from i.imgur.com]