Ok, this had to be the WORST case of cosmoline that I have seen in a long time! It was black and so thick that it blocked the barrel, and the wood was nearly black. But, I attacked it with some BreakFree Powder Blast, tons of scrubbing with dishsoap in the bath, and a ton of elbow grease. Then I applied my signature anal-retentive polishing process to the bolt that was suffering from a case of surface rust and neglet. The result? A gun that cost me $149 in "Good" condition that is now in a condition that they were charging $249 for! And just for reference, the "Before" pic.