I didn’t get much time today to work on the car but I managed to get a few things done. First thing was level out the new trunk lid lip. I started by clamping a pvc pipe to the back to hold the slight curve I need. I tried measuring out a straight line for the trunk lid since it would be easier to make but the rear body is not made square enough and no matter what it doesn’t look even. A slight curve keeps it from being noticeable.
Once it was straight I covered it with packing tape to keep the trunk lid from sticking to it. I cut a bevel into the top so the new material will have a better bond. After that I put the filler back in place and laid a layer of fiberglass over it. The shape is only approximately right but it is such a large area it is hard to get everything right in one pass. My plan is to let it cure for a few days while I am at work then when I get back on it I can remove the support from underneath it and cut and form that single layer a bit better. Once it is close to where I want I will build it up and join it into the old body panels good. That should give me enough thickness to get it nice and flat and be thick enough to mount a trunk latch in it without breaking over time.