Ever see a stream of orange-red rust? Normal at end of each season when my inshore fishermen neighbours cleaned their guns. My nearest neighbour I remember in particular because he had a DH Parker. I don't know how he got it; a question a kid wouldn't ask even among honest men in those times of subsistence living. The head of the stock/action was placed in a jug of gasoline. Somehow that kept it going because 70 years later it's (damascus) in the hands of his grandson, one of the finest gunners for miles around.