GAWD! I had to jump in here on this thread! Not trying to be snooty or anything, but being an old "deck ape", in the merchant fleet, I can't recall ever seeing a line "coiled" on a working vessel. If it's realism you're after, you want to store your line "faked", or "fayed", so it properly pays out as you need it without fouling. And notice I used the word "line", and not rope, as it's properly called a line once it crosses the gunnel from the dock. There is no such thing as a "rope" on a vessel. At any rate, google those two terms, and you can see pics of how it's done. As far as modeling it, you can save yourself a lot of trouble by using wax paper while you're gluing it down, and you won't have to trim or sand anything, as cyano, epoxies, or any other adhesives won't stick to it.
Lordy, as I proof read this post, it did sound kinda snooty, sorry for that, but please take it in the tone as it was meant to be an informative help, and not preaching.
Fair winds, and following seas....
Capt Jack>>>>>>sends