Making trunk panels

[funbnme]

I'm starting to make some templates for some trunk panels. For most of them, I'll use some MDF.

For the panels that cover the tail-lights, I've made the rear template out of cardboard. I have the cardboard cut on one side so it bends easily. I've got a few odd curves and think it will be a PITA to try to cut the MDF at the right angles to make it fit well.

If I put the cardboard templates in the trunk, can I brush some resin on the cardboard bends and let it dry. Then when I pull the panel out, will it wind up holding it's shape? I would like to then cover the rest of the panel with some fiberglass sheets and then cover it.

Does this sound like a plan that will work?