Hey folks: About to reblue a Cooey 39 and would like to know if these were blued inside the receiver where the bolt travels or left in the white. I know the bolt should be in the white but it was hard to tell if there was ever any blue in the receiver due to wear/rust etc. Early model, if that makes any difference. I will be using Radocy so I have the choice of where I apply it. Thanks in advance.