Hi Paul,
I agree with Peters advice and use a board with the rail positions marked and make your railings up on it. This is especially good advice with your model, Dutch Courage, as both deckhouse and wheelhouse are made from vacuum formings and you would do well to keep your soldering iron away from them, even though you may not touch them the heat generated from the iron can cause damage. (some modellers use superglue here rather than soldering)
Your stanchions are flat-etched brass and fragile. Some care will need to be taken when removing them from the frets. My method is to use a new Stanley blade on a cutting board (mine is MDF covered with cork tiles) cut the 4 tangs to free each one and then use a dremel type tool fitted with a fine sanding drum just touch each point to remove the remains of the tangs.
Forming the bends: right angles are the easiest and just require a pair of pliers – rounded corners are the same, just use round nosed pliers which will give various radius – bends, if you are not comfortable bending these by hand/eye then make the shape from scrap wood and when you have the shape correct just bend the wire around.
Looking at a photo, the railings appear to slope out wards, meaning each rail is a different size. scary ! – just make the top rail first and lay it on your building board, then make the second rail to just fit inside the first one – make the bottom rail to fit inside the second and you should end up with the taper required.
Yes – you probably will make a male hen up! of your first attempt, we all do – don’t be put off, the more you make the better you will become – the most important thing to do is to take your instruction book and read each section as you come to it several times until you are comfortable with the procedure, take your time (its not a race) and enjoy the build ….
Cheers and best wishes – Ken
ps – what the plural of radius, is it radi ?