Our hero in the Purdey video clearly noted that a waterproof grease was an option.
He also clearly mentioned gun oil, and used same on the O/U and the SXS.
Like Axel Rose always said, Take it for what it is.
Best,
Ted
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https://m.youtube.com/watch?v=08YDuzJy-Zo You are correct he noted those options along him specifically saying Vaseline mixed with 3 in 1 for some interior action parts which was my point that they still recommended it as an option and have recommended it for over 100 years.
My take away is simple, like you I believe better stuff is available and preferable today. At the same time if one does not have the better grease to use, the Vaseline by itself or cut with 3 in 1 option slightly applied to the locks would work as it has for a hundred years. If used slightly and not slubbered about it is unlikely to cause an issue.
I use Eds Red or Hoppes for bore cleaner, Eezox to oil the metal surfaces, Owens hinge lube, and have used a slight coat of Vaseline on the inside of the locks, and REN Wax around the metal to wood seams. Other lubricant choices can work just as well and in the case of the Vaseline better.
Most lubricant problems come from too much use or no use.
Ultimately within reason what lubricant used is not the critical factor, simply doing the actual cleaning and lubricating is the important thing.
