Chris Byrne at The Anarchangel Blog talks about what he calls the most hated substance on earth - cosmoline.
Any long-time Cruffler (collector of curios and relics firearms) will understand his angst in dealing with cosmoline as we've all done it in the past. Personally, I've used the boiling water method, the Simple Green method, the steam method, and the hot car method. They all work - somewhat.
Read his whole blog post to get more tips on how to deal with it.