I just purchased a surplus G3 retractable stock - my first army surplus non-accessory part. It has a parkerized-like finish. Has anyone out there painted one of these to better match their rifle? I heard that Gun-Kote works well over this type of finish, but am unfamiliar with that product or what it would look like on a 91 next to the standard HK finish. Basically, I am not sure which product to use, how to do it or if I even should do it. Any advice would be greatly appreciated.