Hate to be the odd man out here... but...

I've used CA occasionally on wing center section fiberglass and it's always been fine.
Also epoxy, thinned epoxy, and epoxy finishing resin. They all worked (e.g., never had a wing failure - of any kind - yet). Easier to get a smooooth finsh w/ the epoxy though.

I'd also think REAL hard about extending the center section reinforcement about 1" past the fuse sides; I beleve the points of max stress on a wing are at the juncture of the wing and fuse.

Best technique I've seen for doing a center section (this on a 2 meter plane) is to use about 3 layers of 2 ounce cloth, first 4"wide, second 6" wide, third 8" wide -- and a layer of 3/4 a little wider than that for a smooth finsh.
Apply all the layers at once - with finshing resin (Smooth n Easy or Z-poxy are both on the shop shelf), and smooth/ remove excess resin while wet - very little sanding needed before ironing on the covering.

Just my $.02