Correct, I should have written best left to the exterior, sorry for the confusion. Opti-Coat Hyper Seal can be used as a drying aid, or as a stand alone sealant like Opti-Seal on all exterior surfaces.
Thanks for the info, I think I'll stick with the Opti coat ONR and the hyper seal so far I love the results. I have had the truck two months and so far have received more compliments on this truck after having the Pro+ coating then any truck that I have owned. Everyone notices and comments on the shine.