It's been awhile since I purchased this 1938 91/30 but I finally got the time to strip it down and clean it up. Out of the box it didn't look to be too mucked up with Cosmoline, good thing since this is my first one. Here are a few pics of the different steps and products used...all in all a fairly straightforward but time consuming process. Turns out the major ingredient is elbow grease and lots of hot water...and no the rooster isn't needed but comes in handy to add atmosphere to the photos. Here are a few pics of the metal parts soaking in boiling hot water, the Cosmoline just melted off and floated to the top of the water. One item to note, do not allow the water to cool down...the Cosmoline will congeal back to a waxy substance that gets back on the metal when you take it out of the water.