The undersides of fenders and hood should be satin black. The underside of the body (I believe) should be body color. However, the insides of the fenders under the hood are body color as well. Ditto the body underneath the rear fenders. Valance, if any under the front connecting the fenders should be body color. If you want to check up on me, as I am drawing from memory, get out the Directory and call Terry Wenger, in Ferguson, MO. Hes forgotten more about 39s than I ever knew.