The plastic of those toy cars is soft and kinda waxy, a bit like Tupperware food boxes or buckets. I think it's impossible to make the putty adhere on it and rescribing would be very challenging too. Someone could detail the resin body and make all the details sharper and that way it would be easier to make a 'real' model of a car with resin body.
The 4 door model has different rear than the 3/5 door models:
-Mikko