I am sending some photos of 2 models covered in your glass fibre cloth. The 109 was fully covered in cloth and the 163 had the wing, elevons & fin glass clothed. The fuselage is plastic.
B17G, 10ft span, 30lb built from plans and entirely covered with Bucks-Composites materials ultra lightweight glass fibre cloth and Epoxy resin and Hardener.
My first radio controlled attempt at flying with a Micro-Mould Planet which had an Enya engine fitted. We gave it a hand launch which climbed to about 30 feet then the wrong human input to the radio caused the plane to nosedive straight into the ground. That was the end of the plane.
Supermarine Swift - 55 pounds gross, Cobra 30 pounds S.T. gas turbine.
The photos are self-explanatory. The plug of pink foam was glassed with 2x200 Twill and 1x135 cloth and was split. The foam was carved out then washed out with cellulose thinner. When finished flew very well.