My two cents:
Door handles can point either way. Russ Spaulding once told me that the handles were pointing forward on the cars he photographed and used in his work. I believe the move to pointing them backward happened after owners complained of the handles hitting the rear of the front fender when the doors were pushed hard when opening. At least that's the explanation I got when I asked.
So, if that's true, there should be some cars with forward facing handles, and some with handles that face to the rear. Since the line in the sand appears to be unclear as to when the change occurred, (and I'm open to correction), pointing either way should be acceptable.
Gas caps should be painted body color.