A friend called me today for a recommendation on a cleaner for his dad’s old shotgun. He said his dad was never big on cleaning the gun. He has taken it apart and removed the trigger and everything seems like it’s almost “glued” together. I only use M-Pro 7 and Bore Tech cleaners for simple gun cleaning of new guns I’ve kept maintained. I though this might take something different, but safe for 50-60 year old Winchester shotgun parts. Any help would be much appreciated. Thanks!