I decided to use CLENZOIL after watching these YouTube videos ...
http://www.youtube.com/watch?v=3qbbA23eI80&NR=1 (part 1)
http://www.youtube.com/watch?v=45wYCMt0JKE&feature=related (part 2)
*** unpaid members can't embed youtube vids ***
So, I've been using Clenzoil as my CLP for a while now. I use it on all my firearms and have had excellent results. But how to get the cosmoline grease off a WASR 10/63? I stumbled on these vids while looking for that answer. Sounded too easy (and too good to be true). But since I had a bottle of Clenzoil on hand, I figured I'd give it a shot.
I gotta tell you guys, it worked great! I used basically the same method the guy in the videos did. Striped and cleaned the rifle last night, waited a couple hours so it had time to soak in, and reassembled. Then I wiped it all down with a clean rag and let it sit overnight. This morning I field stripped it again, and almost all of the cosmoline grease is gone!
There is still a little here and there in the cracks and crevases (I didn't go crazy last night trying to get every little bit of it out). Just figured I'd strip it and clean it a second time if needed. Overall, I'm amazed at how easy it was to break down and remove the cosmoline with just the Clenzoil and a toothbrush and some rags.
Not affiliated w/ the company in any way. Just thought I'd pass the info along in case it might be helpful to others