A lot of owners will use differing greases that they find suitable - if you have found one then that's good, continue to use it. I use the Toyota red rubber grease. Its designed to lubricate the pins while not attacking the rubber boots and its what I will continue to use after years of hassle free use. The slide pins should have no rust on them at all - they may get discoloured over time but not rusted. If they are rusted then moisture is getting In somewhere - more than likely through the