Well, after some experimenting, I think I'm 'one and done' using Elmers Epoxy Resin.

I used it both full strength (peanut butter) and diluted with De-Nat Alc (epoxy-like). The former was strong enough but so opaque I could not see lines or cutouts through four sheets of f/g. The latter was only slightly less opaque but the laminations created were too soft/flexible - like a soft baked cookie.

The undiluted 15min epoxy produced a much stiffer, far more transparent lamination. This combo will allow me to begin cutting the sheeting out to the correct shape and then lay the f/g laminate over it and trace easily. Seems perfect for my retract doors.

Can anyone expain the different characteristics of Epoxy & Epoxy Resin (the more liquid stuff) when used with f/g?