I was listening to Big iron by Marty Robbins and got to wondering, what is a "big iron"? So, through the research I did I figured it was a buntline special. I picture the "big iron" he sings about being something like this http://www.gunbroker.com/Auction/ViewItem.aspx?Item=432832273 That being said. What kind of finish is on it, whats the process called and how much does it cost? I attached a picture of another gun with a similar finish.