I do, and it seems to help, also helps with the odor of fresh casings which I am no fan of. I also soak my fibrous summer sausage casings in warm water for about a half hour then a quick soak in vinegar. This seems to help the casing peel off easier when done.
I read it some where about the vingar thing. I will have to try it one day soon as I'm making sausage today. I will let you know if it works cause the wife doesn't like the natural casings I have been using to date.