Ordered some 3M tape and a 24"x28"x1/4" sheet of expanded pvc, smooth finish, easy to use, and only $25 a sheet
Will be building a multipiece stealth kamm, consisting of a 3 piece top "spoiler" and multiple side pieces so the shape flows well with the car, all will be painted to match! Might do a YURASTYLE design over the taillights.