I created a high power rocket with airframe components made from hand-rolled tubes and couplers. I rolled the tubes out of multiple layers of 110 lb. cardstock. (Paper rockets were the inspiration for the project and building a huge one was the goal.) I used a length of Schedule 40 PVC that was left over from a recent renovation as the mandrel and I did not need to use any release film. For the couplers I found a can of tomato paste in the cupboard that was about the right diameter for a mandrel. I didn't have a 38mm motor case at the time, so for the motor mount I used another piece of pipe that I built up to be 1.5" in diameter. (When I got my case, I tried it in my mount and the fit was perfect.) Because of the width of the cardstock I had to make the airframe in four sections and join them together with three couplers. I ended up rolling the tubes out of 7 layers of cardstock and the couplers out of 4 layers. The rocket is very strong! So not only can it be done, but depending upon how you do it, the process can be surprisingly simple. I rolled mine on the dining room table while I watched TV, and just used white glue on each layer except for the final one, which got regular Devcon 30 Minute epoxy. I didn't need release film because I was careful to avoid getting glue on the pipe when I rolled the first layer. For mandrels, look around the house for everyday objects that might be the right size. A barrel-type container of rolled oats is almost exactly 98mm in diameter. You can get one cheap for a buck or two at a dollar store.
For the mandrel for a 29mm motor mount adapter for that rocket, I used a 1.125" dowel and built it up with two or three layers of cardstock until the diameter read 29mm on my pocket caliper.
