Fibre glass+putty+the existing metal body=heavy (which is not good for a sports car no matter what its running be it JZ or rotary)
Car with a complete fibre glass body exposed to the elements= paint and putty cracking which is again not a pretty sight considering the FD3S Rx-7 is one of the most beautiful and well engineered cars designed...
Efforts are commendable but it just doesnt seem worth it to spoil the already scarce good Rx-7's out there...
Hassan