I'm in Alaska, and I'm building a Damascus 1911 (slide gets in next week!), and I'm going to get the frame in a month or so. The slide is stainless. I'm going to get severn custom hard hat finish, but I'm still deciding on carbon or stainless. Stainless pits without being treated on a rail, but carbon rust easy... there's obviously more to it, but functionality wise, what are some opinions on the matter?