Since you'll be finding out soon that Fiberglass Cloth is the Rocket Gods Gift to Rocketeers, I figured a Bump for this Thread is in order.
It has some great Info, and some good Tips for beginners like us to learn a lot from it if we keep it current.
I've been having the best luck lately when doing a single layer of lightweight cloth by coating the Tube in 20 Minute Epoxy, then placing it onto the Cloth, that is already cut to size and layed flat on a Piece of Parchment Paper that I hold onto the Benchtop with Weights, as it is a Non-Stick Surface, and masking Tape does not hold it securely to my Benchtop.
I fuzz up the edges of the Tube ends, so that as the overlapping Cloth is curing, the Epoxy does the work of absorbing into the Edge of the Tube and making the Cloth and the Tube one.
After the thing has cured, I cut away the excess on the ends with a Hobby Knife.
Before doing any sanding, I wet my Nitrile Glove clad Finger in Gorilla Brand Super Glue, and rub it into the ends thoroughly to ensure that when I start to sand I have a uniform and homogenized surface to which to apply my abrasives. Thin CA would be too messy for this Step, but it comes next.
ETA: Note of Caution on next Step! Do this part outdoors, as the inside of the BT with all that CA in it will put out some nasty Vapors, plus, you don't want CA Dripping out of the Tube onto your Floor or where there might be Pets or other Floor Hazards. Outside, with no Bystanders, and bring the safety Safety Glasses and Nitrile Gloves.
Sometimes, on my Super Thin CA, when I open it, there is a little bit in the Nozzle that shoots out. That's why the Safety Glasses.
After a very light sanding, I drizzle Super Thin CA down the inside of the Tube to seal it up inside, and on the Thin Wall Tubes that are glassed, you can usually see the CA soak from the inside to the inner surface of the Glass. There is no doubt that this inner hardening after Glassing enhances the Structural Integrity. It certainly adds weight!
Anyhow, FG is an absolute Joy to work with if you let it be. I am getting a great deal of Practice in on smaller Models. By the time I get Certified I'll have a few years of Experience under my Belt of proven Composite Construction Techniques.
Rocketry was starting to feel like Work before I discovered Fiberglass Cloth. Now I can build a Durable Rocket, but stay light enough to keep Weight Nazis out of my Build Threads.
If they want to question the Stability of my Builds I'll kindly point them to some of my Threads where I used my old Techniques, like papering everything. They see me using serious materials like Glass and even occasionally doing Computer Sims on Open Rocket, and they take me much more seriously. It's quite understandable really, and some of the Members here that I at first thought were sometimes rude or condescending, are actually now some of my greatest Teachers when it comes to broadening my Skill Sets as a Modeler.