Hello.

On a 64 1/2 the trunk area should be body color.The following should be natural.The gas tank top,filler neck,filler neck hose and clamps,trunk latch(both pieces)and the trunk latch mounting bolts and gas tank screws.The taillight wiring shouldn't have paint overspray on it.Neither should the taillight bucket assemblies.If by acceptable you mean that people won't go EEWWWW!! when they see it then yes it's acceptable.If you mean will an MCA gold card national judge not ding the dickens out of your car for it,then no,it isn't.Hope that helps.
