I just finished a "canvas" project on my trawler that didn't involve any canvas. The PO had a complex set of 7 panels that enclosed the aft cockpit. They were large windows in Sunbrella that hung from an awning track, zipped together, and attached by bungee to the gunnel. The design was okay,* but the Sunbrella was moldy and torn, the clear panels were cracked and no longer clear, and the zippers were shot.
I bought clear vinyl, tan PVC, and a quart of HH 66 glue and used the old panels as patterns. I reused the awning track that had been sewed onto the Sunbrella. I glued it to the PVC (inside and out) and its holding fine.
But my biggest change was getting rid of the zippers. I have zippers on my camperback on the CD 16. They are the most fiddly part of dealing with the panels. So for my new project, I used Dot Twist fasteners to hold the panels together. Each panel has a three inch overlap. In theory, the wind can come through the panels more than a zipper, but it hasn't been noticeable so far.
The up side is that I can fasten 5 Dot fasteners quicker than just getting a zipper started. Zippers are usually the weak link after a few years, either losing teeth, tearing out, or corroded zipper pulls. The SS Dot fasteners are fool proof and, if something changes, I can move one by punching a hole and putting in another fastener. So far, all is good.
http://www.c-brats.com/albums/album3149 ... 114139.jpg
* Lots of shops can do a good job of sewing using the best materials. As this thread points out, design is what makes an okay camperback a great camperback.