There is a spot of oxidization on the bolt of the little MrkII(6" barrel is still little). Anyway to get this off? I tried scrubbing it with Hoppes#9, that didnt work, so I gave up. Yes it is sad, yes I am O.K. with this. Also, what can I do to get rid of the spots of Oxidization along the backstrap, and the rear of the reciever, behind the bolt. It is a blued gun, so nothing nasty.