Re: Alumihyde and bluing
If your going to coat the entire action inside and bolt, depending on how much clearance you have to work with the dura coat works well. It will rub off some, as does all coatings.
You should be fine with factory actions. Custom actions i cant coat all parts.
On tight fit actions i use CeraCoat, from the dura coat website, its a thinner material and even more durable, it has ceramic mixed in with the paint. It is not a two part epoxy mix, when you order it they mix it at the factory, Air is the catalyist. You store the bottle in the fridge and its good for 6 months from purchase date. It stinks real bad and cures rather fast.