Legendary F1C ("FAI Power) Experimenter Bill Gieskieng used to use Skyloft applied with "Deft" (a sort of varnish stuff from the hardware/paint store)...but covered over it with Monokote. He said it added a lot of strength
to sheeted areas without making them "brittle" like FG/epoxy or carbon mat/epoxy.
I have some, but haven't used it. I'd use it something like carbon mat, applying it over a couple of thin coats of clear dope, attach with one coat of really thin clear dope, then a coat of finishing epoxy. Actually, might apply a layer of carbon mat over the Skyloft.
I just finished a new CF/balsa control handle (Chris & Alan Propeller Co.), and did a little re-shaping after I thought it was finished. Was
shocked at how far into the balsa the epoxy had soaked. Don't do that! A coat or two of thin clear dope will save weight by reducing the epoxy soaking.

Steve