I needed to attach the bumper to stablize the rear because of the major cutting to come.
Looking at "For Sale" ads, I found this nice interior shot, that defines the trunk nicely.
From the graph paper I transfered the trunk layout to the 1mm plastic stock.
A strip of plastic is glued to the underside of the trunk to create the lip.
I have a photo of the inside, so I added some of that detail.
Test fitting the trunk here.
The spoiler will be removable just like the reference in order to sand and paint it. Fitting the spoiler and giving a little more thickness with putty. It's a snap fit.
I spread some Elmer's Wood Filler over the trunk to start forming the contour.
(Reserved for completed trunk)

             On to the roof !