In the course of adding masts and other details to ships earlier this year, I collected some useful links on various WW2 ships, and leaned hard on the work of some of the amazingly talented ship modellers out there.
T2 Tanker display model; The Model Shipwright large-scale T2 tanker original plans; really nice display model of a small WW1-era freighter
The Historic Naval Ships Association’s collection of WW2 recognition and target ID manuals (not PDF, unfortunately, but nicely HTML’ized) is worth a look, as is the rest of their huge online library – check out the grey menu down the right hand side for all sorts of mostly-WW2 manuals, publications, and plans.
Meanwhile over on the gloriously named Last Stand on Zombie Island, a really cool article on how navies made smoke (deliberately). Lots of other cool WW1 to WW2 naval stuff over there too, well worth a look.
I know I’ve linked to Boom & Zoom Graphics before, but their basic guide to the paint schemes and markings of common WW2 aircraft is nice and clear and worth bookmarking.