Well, as far as rigging material goes, I am a 1/700 guy, but I use stretched sprue for two reasons: 1) It's free, and 2) You can make it almost any diameter you want depending on how long you stretch it out.
My technique is to clip a short length, about 3 inches, heat over a candle, and stretch slowly until it's about arms-length apart, then I tape one end to the wall and clamp a light weight (like a metal paper clamp) to the bottom end and allow the spure to cure for a day or so. This seems to really strengthen it. Color it with a black or brown permanent marker, let dry, clip off the length you need and attach with tiny drops of CA glue
You have two kinds of rigging on a warship, the wire rope that doesn't move (which is most of it), and the signal flag ropes that go to the flag bags located somewhere on the bridge wings. Those ropes will be a brown color. Some guys use paintbrush bristles for those ropes and they look fine. For rigging diagram ideas, go to ModelWarships, http://www.modelshipgallery.com/gallery/index-gallery.html and Google Repulse in the Search box to find builds of that model.