More detail added.
I was going to use separate stanchions around the main deck and string them with fly-tying thread, 0.03mm dia or this Ushi van der rosten stuff, same dia.
I had a dry run on some scrap card just to see if it was possible. Then I drilled 0.25mm holes all round the edge of the main deck, stopped counting when I got past 100.
Fitted some of the stanchions and sat back to admire my work......... they were invisible, even with thread fitted they were still invisible, so I yanked 'em all out.
The problem is that the railings that Trumpeter supply for the main deck are really only generic railings so where they are supposed to skip over the fairleads, which are all in the right place, there's not a snowballs chance in hell of this happening, the pitch is completely wrong.
I've resorted to my own generic stuff. By mixing and matching four different pitches, I've managed to fill the spaces between each fairlead reasonably well, still got to skip over the top with separate pieces of rail, somehow.
Watch this space.
Haddock. (brassed off), not really, I've convinced myself it's good fun.