12-13-2013, 04:40 AM
I had this discussion with Bill A. about grease on the threads, and he mentioned the benefits of cosmoline over white lithium grease, which rots and smells.
I have done some where I tried thin Remoil over my Cerakote finishes. Every receiver I mess with now is Cerakoted, so I don't have a steel on aluminum fit anyway. The Cerakote galls when dry, so it's best to have oil on the threads. Other than that, I'm not sure how big a deal it is.
Here's the picture of the M4 that appears to have the threads stripped on the upper too:
![[Image: 368242851.jpg]](http://www.thefirearmblog.com/blog/wp-content/uploads/2009/06/368242851.jpg)
I have done some where I tried thin Remoil over my Cerakote finishes. Every receiver I mess with now is Cerakoted, so I don't have a steel on aluminum fit anyway. The Cerakote galls when dry, so it's best to have oil on the threads. Other than that, I'm not sure how big a deal it is.
Here's the picture of the M4 that appears to have the threads stripped on the upper too: