What has been your experience with using 10 oz. cloth over plywood with epoxy? I know 6 oz. becomes very transparent. Is 10 oz as clear? Suitable for finishing bright?
In addition to the cloth You need to consider the epoxy too. West's 105/207 is formulated for a "Clear" finish. Other epoxies , MAS, System Three, etc. have a resin/hardener combination similar to West's.
I used a double layer of 6 oz. on the bottom of my cedar stripped canoe with West's 105/207
Epoxy and achieved a nice clear look. It took 8-9 coats of varnish to make it pop, but it works.
I use almost nothing but 10 ounce and I find it to be clear. If you are not sure just glass up a piece of scrap. I think you won't really see much difference.