Here's some updates. I was checking out pictures on line to do some thing to make the interior look a bit better. I noticed a few Norseman with a sort of quilted interior liner attached to the tubular air frame, probably a good idea in Canada. It took a couple of attempts but I ended up glueing blue paper towel to the interior and wetting it with a mixture of water/ white glue. It formed nicely to the fuselage and I was able to trim out the excess and the windows. I will airbrush a shade of grey.Hopefully it gives off a nice textured(quilted) look.
First shot is of my second and third attempts, second shot is the work in progress.