Metal finish on 1908 Brazilian

I have a really nice 1908 Brazilian that has obviously been refinished. Everything has been blued. It is a pretty nicely polished blue, so pretty sure it wasn't done by a military arsenal.
I would like to return the finish to the same as it came from the factory.
Can anyone provide definitive information on the metal finish on the different parts of the Brazilian as it came from the factory? I understand the bolt and receiver were left in the white, with other parts being blued. What about the buttplate? The barrel band springs? Cleaning rod? Stock disc?
Thanks for any help.