Hi Carl (@clipper): It was difficult to sand the seams on the nose section and stay clear of the glass panes, so sanding the entire nose section really saved some time. I was waiting to do the last polishing until I was done working on the rest of the fuselage and wings. There is always a chance that the nose could pick up some construction damage until all of the rest of the plane is done. I have a couple of sets of the very fine sanding sticks, so I will use them just before painting. I sometimes wait to apply Future until I have painted the plane, and then I apply the Future to the window panes with a brush. I have had trouble before with the canopy masks pulling up some of the Future when I remove the masks. It doesn't always happen, but in this case I think I will wait until I remove the masks. I used Future on the inside of the nose section, and I also plan to dip the canopy in Future before I apply it.
I don't think the cowling will need anything other than Tamiya putty. There aren't huge holes to fill, just a bunch of seams that are in some inconvenient places. This inner cowling will be hidden by the engine and outer cowling, so I think it will be fine. The outer cowling is in 2 parts, so I am sure there is more fill and sand in my future.
One of the cool things about using this plane as my "lead" model is that I can use these techniques, and then adjust them on the next two it they don't work well.
Looking forward to the rest of your Hudson build.