Lovely ship and an absolutely gorgeous texture! I like the suggestion of grit & grime all over the hull - these ships would constantly have been covered with dirt from cargo, smoke residue, and other things.
In my opinion the skin is realistic - makes the hull look very interesting! The Allies actually did use similar camo paint on a few merchant ships in the Atlantic, instead of just solid grey:
https://anticsonline.uk/Product/Coas...3bS_N108798999
For some reason, camoflage really seems to have varied with UK and Norwegian merchant ships. Some were painted all gray right away, some had detailed camoflage patterns (like above), and some kept their civilian black or white hulls for a long time, which is strange to me. Maybe it all depended on the availability of paint in a shipping company's stock.
IIRC regulations for American ships said camo was mandatory after the US entered the war, and all funnel logos, names, and bright colors had to be covered up. But I have not found regulations for other countries.
Anyway, great work with this ship!