Hi, @lis. Sadly (for my wallet) I build in just about all of the scales, but mainly in 1/48 or 1/32 as I have gotten older. It is easier to see and manipulate the parts on a larger scale plane, but I will build a 1/72 kit if it is something that isn't available in the larger scales, or if it is large plane like a bomber. I also build ships, the occasional car, as well as some Star Wars and Star Trek kits. I also do model trains. I just dismantled my layout so it can move to my new house, which should be ready next month.
As far as the prop, I think it is one of those things that you will need to rely on photos or the guides that come with the kit or decals. I suspect that the prop may have been painted all black in some cases, but later only on the back, or perhaps not at all. The back was painted to prevent sun reflections off the metal into the pilot's eyes.
