My first time with autos. I believe that autos require breaking grease on the inside of the barrel wall. I looked at the service sheet but it doesn’t show oiling of the barrel wall (NH36). The greases (Moebius) I can see: 8212 – aluminium walls 8213 – brass walls 8217 – large barrel walls (guess - pocket watches, alarm clocks?) How do I tell brass from aluminium without scraping the barrel to see what is under the plating? One more important question. If I grease the main spri