Surprised the Mo paste didn't work. I've used the Honda Moly 60 on drum brake sliding points.
That said, short of any manufacturers' specific recommendation, Wurth HHS+ is my go-to for applications such as this. Excellent lubricant that applies as a liquid that will penetrate than set up to a stringy, tenacious film that is salt water resistant. I use it on everything from vehicle hinges, cables and slides, to an aircraft cabin heat control (metal on metal cable w/ bends) and, recently a stainless anchor swivel. Magic on vintage metal on metal shift lever pivots and linkages. Not inexpensive, but well worth it.
From Wurth:
Pressure resistance under high pressure loads
Despite high pressure loads and the shear movement of the base body, the lubricating film of the HHS Plus remains active and does not tear off. Reliably separates the opposing body from the base body, ensuring optimum wear protection under high pressure loads.This is only possible with dirt-free lubricating points.
Extremely high-pressure-resistant semisynthetic oil.
Versatile lubricating oil due to its combination
of balanced, matched properties
High-pressure resistant
High creep capacity
Active adhesive effective
Good material compatibility
Splash and saltwater-resistant, withstands weak acids and alkaline solutions
Contains no silicone, resin or acid
Features:
High-pressure resistant
- Extraordinarily tear-resistant lubricating film with outstanding noise and vibration damping properties
High creep capacity
- Excellent lubricating properties with close tolerances.
- Added protection against corrosion.
Active adhesive effective
- No throwing off of the lubricant with turning and rotating parts
Splash and saltwater-resistant, withstands weak acids and alkaline solutions.
- Contains no silicone, resin or acid.
- Operating temperature range:
- -35˚C (-31˚F) to +180˚C (356˚F)
- Temporarily: +200˚C (+382˚F)
- Color: Yellowish
