The Typhoon is the ultimate submarine nuclear missle platform and they are HUGE. They make our Ohio class look like bath toys. There are only a handfull of them in the Russian Navy because they are so big and expensive, the Russians still rely on smaller and older platforms like the Delta class. The Red October (from Hunt for Red October) was a fictional heavily modified Typhoon sub.
Oh, and the panel lines you refer to, I believe are the Russian version of SHT tiles. Don't ask me what SHT stands for (don't know) but they are basically rubber tiles stuck to the hull to make the sub quieter.
If you are interested in finding out more, there is a very excellent book called Rising Tide by Walter Boyne. It is about Soviet submarines in the Cold War. Not much about Typhoons in particular, but tells a lot about their subs and the missions they did.
By the way, nice model! I would say the side rust is a little heavy, but I have never seen a Russian sub so who knows!