I was quite happy with how they looked after just a quick cleaning with some bore solvent and brass brush. Came out much better than I had anticipated. This poor thing hadn't seen a cleaning in what I can only assume has been decades, there were even cobwebs inside the barrels that didn't show up in the photos!
I am located in Vancouver, BC, Canada. I was thinking to try and use a gunsmith relatively close to me by the name of Stuart Newby of S J Newby Gunsmiths. As far as I'm aware almost all is work is in double rifles and shotguns and is very highly regarded. However if anyone here knows of someone else around this neck of the woods with the ability to check out the barrels a point in the right direction would be greatly appreciated!