nice job all around. it is great to have extra parts you can cut pieces from (rear fenders).
on the fiberglass, great idea, have you looked into foam as a form to work the fiberglass onto? actually, you would need to use an epoxy base as the fiberglass resin will likely melt the foam (found that out once when trying to mix a small batch in a styrofoam cup, lol). it is easily sanded to whatever contour you need and weighs very little. just thinking the door weight would be less and also the time spent cutting and assembling the wooden form would be more compared to the foam idea.
here is a guy who uses pink panther insulation foam, laminated together to a suitable sized block, then cut to the rough shape with a home made hot wire cutter, then sanded smooth etc etc. maybe an idea for a console or a speaker box for somebody who hasn't started that yet. anyway, the motorcycle seat this guy makes isn't much differently shaped than a console. just some ideas.
https://www.youtube.com/watch?v=MAinuf5I_dw
https://www.youtube.com/watch?v=CtvnRVtNVpk