Funny you should say that.

That'* what I did just a few minutes ago and it looks pretty good.

I would glass over the cardboard, sand it down and get it as smooth as possible. I would then spread bondo over the whole thing, smooth it out as much as possible (this may take 2 times with bondo. I would then prime it, then lightly dust it with black spray paint. After that sand some more, and the black spray paint will sand off, but leave black paint in the low spots that you will have to smooth over some more. After all that you have left is adhesion promoter, texture, and paint.

Thanks Chase.
Looks like a time consuming process, with all the drying time and sanding, but I'm sure the end result would be a perfect showpiece.
Good way to spend the winter. Puttering away on little projects like this. Breaks up the monotony.

How much should I overlap the fibreglass onto the plastic?

do not apply addheastion promoter over primer, only under it DIRECTLY onto the plastic

personaly i think you should work on the card board shape a little more,cut outh a peice for the front that will "flow" with the shape of the pod them a peice for the side and tape it on the inside like yo uhave done with this one. as for how far to over lap the glass i would say atleast 1-2 inces, but i gould even be tempted to glass over the whole darn thing.

Well, I gave it a coat of fibreglass..............

I HATE this kind of work.

What a fricken mess

I almost thru the whole disaster in the garbage. Glass fibres sticking out everywhere....fibre glass resin everywhere..yuckkkk.
My hands are covered with this craap and I have to go to the company Christmas party in about 2 hours. :(

.....so I put it down in frustration to dry and back to polishing my throttle body. :P

Need more and better pics please...

Ed does have a point...or maybe just put silver metal tape over it...

Never too late for the Silver Tape.

ok looking good....it still seems that you have a little evidence of the seam from the new addition....now blend in the conrners......you can either choose to add more glass or start the bondo at this point...the bondo is easier to make smooth

doesn't look bad, im still not "feeling" that shape but your off to a flying start

keep the pics coming

Ya Peter, but I didn't have much choice on the shape, so have to make due with what I have. I'm sure you could turn this into a show piece.

The pic above is roughly where it will end up.
You can see in the other pics above how well the back fits to the odd contour of the Bonne dash.