Hi all, I have a WASR-10, and also a WASR-3. I just recently got the WASR-3. I had some problems last week at the range with FTE's and brought the rifle to my gunsmith. The gunsmith smoothed some burrs off of the bolt, then sent me on my way. I was on the range again this past weekend and all the problems seem to have been eliminated, but on teardown after shooting, I noticed the gunsmith put some sort of grease on the rails where the bolt slides. My question is I use Hoppes #9, but have never used grease. What sort of grease should I use, and what other products should be used to properly maintain the rifles?