The meat is cut during processing. It is only rarely minced. This is repeated until the desired degree of fineness is achieved. Then the meat is seasoned - with salt and other spices - and bottled. This filling can be done in natural or artificial casings.
The typical noble mold coating on the edge of the salami can be either of natural origin or artificially applied. Of course, it would occur during the maturing process of the salami, which can last up to months. Artificially of course much faster. Sometimes the salami is additionally smoked during its maturation to give it a special taste. Some other varieties ripen just like that.
If you look at the shelves in the local supermarket, you can almost assume that the ciabatta salami with a fine layer of noble mold is the most popular salami - at least the shelf is empty with almost every purchase or you even reach for the last or penultimate package.