Here's what the lenses look like from the outside. I am pleased. Now to just not mess them up in the painting...

2 attached images. Click to enlarge.

Ralph, if the water gets deep, there's always overall PRU blue! Or that Chinese one in OD and neutral gray. You would have to source their roundels and tail stripes.Navy intermediate blue (3 tone scheme) is either close enough or the same as PRU blue.
Your take on NMF looks fine to me.

Looks nice and shiny Ralph.

Thanks Magnus. The kit just provides windows. The lenses, one on each side and two smaller ones on the bottom, aresmall pieces of the tube that comes on the end of a new paintbrush. I put a drop of clear plastic parts glue in it to hold it and hopefully look more like a lens from the outside. Unfortunatley they got messed up when I put the nose weights in. I used small fishing weights and white glue to hold the and that glue seeped into the lenses. Oops. But they still look more like lenses than the plain window (which would have been messed up by the glue even worse without the tubes in there.)

Craig, thanks so much, coming from you that is a compliment for sure. I followed a tutorial you posted over a yer ago that I went back and found before starting. Unfortunately adding future seems to actually dull and darken the shine a bit.The photos posted here were taken before that. When I post the finished model it won't be quite so shiny but still I like using the two different shades.