Pencil dilemma

[Alex Ouroboros]

How well those mechanical pens hold against water exposure, especially salt water?
What I like about Croquis is there isn't much mechanics and it's all plastic anyway.

Had my Croquis quite a few years now I just bound a thin bit of bungee to it and sits spot on in my wet notes, it’s been on very deep dives in the sea and fresh and is perfect with thick dry gloves, looks brand new.