As I said, good metal prep is required for using epoxy, I've had excellent results by sanding both mating surfaces with course sandpaper and degreasing prior to making the bond, if you just degrease and try to bond two smooth surfaces, it will likely fail. I epoxied a front and rear sight on a 12ga shotgun for turkey hunting about 20yrs ago cuz I don't like just a bead, a few years ago I tried to remove the sights cuz I didn't use that gun anymore, they wouldn't knock off, I had to use heat to remove them.
Tim