I think you did right in using the vinegar. Vinegar doesn't attack the metal like naval jelly does, and it's mild enough to wash clean with water afterwards. The only problem I would foresee would be in removing the bluing on an older Remington 700 BDL. It almost looks like they sprayed an epoxy shell on some of them.
Admiral Isoroku Yamamoto - “You cannot invade the mainland United States. There would be a rifle behind each blade of grass.”