Barry, he is refering to something like "Vette Panel Adhesive/filler" from Evercoat (part number 870) . I think it is basically a fiberglass reinforced polyester filler like "Everglass".
I learned about it from a Vette specialist here in town back when I was doing my Vette. We bonded on panels with it, just as the name implys without a problem. Of course, you better have the thing ground good and clean or it isn't going to do it's job.
In this particular case I think you are right though, to spread apart the two layers on Franciscos hood to get this "body filler" like stuff in between would be a challenge. Sticking the tip of a applicator tube on a product such as the ones you mentioned would be much, much easier.
Of course, there is still the issue with the SMC right? What would that 82 Camaro hood be made from? Isn't that about the time GM started using SMC? If that is the case the adhesive would definitely be the best choice.
Evercoat also sells a similar to #870 (that is the quart part number, 880 for gallons) called "SMC panel adhesive" (part number 994) that may be a choice as well.
But I have to tell you, with what I learned in the last thread where this SMC vs Fiberglass thing came up, I am not sure at all if this product is a good choice ever. It states in the catalog "the only polyester adhesive strong enough to bond small SMC panels. "Small" , what the heck does that mean? It's bond is only good enough for "small" panels? Do I want to use it at all on SMC is my question.