Hey Gumpy, straightshooter, and Marlindude. If I remember correctly, I went over the barrel of the Mauser about 5-6 times. Could have gone over it many more times since it goes quickly but I didn't want to make a 119 year-old barrel look too new. And the Oxpho is about the most durable cold blue I've found. Marlindude, that is a very nice finish you put on that revolver! That picture is more representative of what the Oxpho can do than the one I posted. Nice job!