I bought a razor at an antique shop last weekend and its in fairly decent condition but does have some rust on the blade/spine/tang. The rust on the blade is no problem as it doesn't go to the bevel and I think handsanding and polishing it will be easy. The rust on the spine might be a bit of a problem though since the spine and tang have been blued. At least I think that's what it is. Its more of a grey color. I'm not sure how deep blueing typically penetrates or if its more of a surface treatment but I'd like to preserve it if possible while still getting rid of the corrosion. Anyone have experience with this? Is sanding possible or should I just do what I can with some MAAS or mothers polish?