I need some material advice, do you guys think this looks like patina metal? If not, what would you suggest I go about doing in order to fix that? Gah I feel like I can never get materials right. (I'm using Xoliul Viewport Shader btw.)
At the moment, it looks more like rust than patina. Rifle barrels that have been well kept tend to have darker spots as they age: You don't need to over do it, however - a century isn't THAT old, assuming the weapon has been well-treated. These two examples are from the 1890s & 1860s, respectively.