I'm working on the same model myself. Just working on te ice channels along the hull. Soon I'll be doing the bow plating. So I have a question that maybe someone can answer... The iron plates are referred to here and there as being "riveted" in place. Matthew Betts, in his book, shows them as having a row of rivets all the way around the perimeter of each plate in the external hull side elevation dwg on pg. 135. That would imply that they didn't overlap. But the details of the application of the actual brass plates on his model as in Figs on pp 184 and 185 show them apparently overlapped and with each plate having rivets simulated on only two edges, as they would look if overlapped and riveted in typical platework style. And they overlap from bottom to top and from aft to bow, like shingles on a roof (the upper and most forward plates being topmost.
Q: which is it? I can make an argument for both designs having advantages. Overlap seems more structurally strong as you have fewer exposed edges for the ice to get at, but on the other hand, each seam has a raised edge.