I can't comment on the period correctness of the blued barrel of the TC sidelocks. I like the way they look. I like a good brown, just not as much as a nice blue.
I would love to use my dad's old rifle for it's intended purpose. I'm just not too crazy about limbering that timber. It's heavy. Plus, if it got damaged, I'd feel awful. Not that I'm paranoid about the value. Dollar value is only important if you're going to sell it, and I wouldn't sell it unless absolutely necessary. It's just a very nice piece of American history.
However, I wouldn't even begin to know who to take it to in order to get it checked out.
If they damaged it through accident or incompetence, or if they're unscrupulous and sold it/swapped it for a piece of junk, I'm out one very valuable, very nice old rifle.
Plus, it's something that belongs to my dad. Sadly, some day it will be one of the few things I have to remember him by.
Plus, the TC seems to be stout like a Ruger. Then there's the fact of how much (little) money I have invested in that Renegade. I paid about $125.00 for it and it is in like new condition. Plus, it's a lefty. I'm a lefty, so it's a perfect match.