I have a new project that for the time being Ill call Project Sows Ear. Its a 1970 or 1980s vintage Brazilian made Rossi Squire .410. If one were to look up ugly in the dictionary, hed probably find a picture of this gun. As a project gun Ive already changed the stock from a POW grip to an English grip, I plan to resculpt the beaver tail forend while still keeping it a beavertail, just a much sleeker beaver tail. Right now, and the reason for this thread, is Im trying to figure out how it had been blued. The barrels almost look like some type of stainless steel offshoot, and what little is left of the former bluing looks as if it was painted on. Does anyone have any experience bluing the barrels on these things? I cant say for certain, but it looks as if the ribs might be brazed or silver soldered. Using an icepick point Ive scrapped down into the crack between the rib and the barrels, but dont see any tell-tale copper that says brazed. Id just as soon hot blue it if theyve been brazed.
Thanks for any help yall can give me on this project.

Original POW stock

Resculpted English stock

Topside of barrels, this is how I got the gun. Yes that's a coin finish on the frame, it should make a handy mirror if I need to do some grooming while out in the field.

Underside of barrels with remainder of bluing (or paint?)