Depending on when during his career he built it, it very well might be built with polyester resin, rather than epoxy. We didn't start to have good boatbuilding epoxy formulas commonly available until maybe 1974 or 1975. Regardless, since current epoxy resins stick better to old polyester resin than more polyester would, any new resin work should be done using epoxy resin. Whether or not it will be a perfect color match is hard to say. Polyester resins contain a promotor which reacts with the liquid hardener, generating heat and hardening the resin. There are several different types of promotors and they tend to tint the clear resin a little bit - red, blue, green, brown, etc. depending which one was used. So, your "clear" epoxy may not be the exact same shade as your "clear" polyester and spot repairs will likely show a bit. Good varnish will help hide any variation.
As to the glass-textured areas, it's hard to say much without actually seeing them in person. It is certainly possible for the wood to expand a little bit, stressing and stretching the cloth slightly (which fiberglass does not do well and which is often caused by heat during storage, like up in the rafters of a barn or garage) and you can end up with slightly weave-textured surface areas which originally were perfectly smooth. In the worst cases, the clear glass may even start showing patterns of little white fractures down in the weave. They really aren't a structural problem, but they are pretty much impossible to remove, because they really are down in the weave and not near the surface.
The one thing that you really don't want to do for cloth-textured areas is sand them down smooth, because you will be cutting into the fibers which are holding your canoe together. It would usually be possible to roll a couple fresh coats of resin over them, let that cure and then sand the resin smooth, but you don't want to hit the cloth. Old, refinished strippers very seldom come out looking perfect or new and it may be a far better plan to clean up what you can, varnish it well for protection and live with the fact that the old gal may have a few battle scars.