I recently purchased a 32 Mosin and I had to clean all the cosmo off that was left. I also have a 48 Yugo mauser that had the same thing done to it. I'm not sure what the life stories of these rifles are but I would presume that they were in boxes for at least 30 or 40 years with no human contact at all(or they had some guy who spent 12 hours a day cleaning and repacking these rifles for his entire 40 year career.) My new thread questions is this: I have an old Springfield Sears (I think) department store shotgun and I want to do the same thing that was done to my Mauser/Mosin however everybody keeps talking about long term storage as being 5-10 years. The plan is to pass on my grandfathers shotgun to my young nephew in the shape it is in right now. I have to be missing something. I know about the cosmo, gun wrap paper, and storage bags from Brownells and other places but they all say the same thing as you about the 5 to 10 year long term storage. Is there a free pdf that covers mil cosmo long long term storage or am I an idiot?