I'll check out Zoop Seal. I've found the following product from Australia called "Like Armour" clear lacquer. I'm going to try and get my hands on a small quantity of the Ultraviolet safe version and then bake it on, assuming I can find a large enough oven. I'm not that concerned about chipping on the trim pieces so I think this product may work well. I'd like to avoid the need to re-apply the product.
Applied Research of Australia Pty Ltd - Products like Armour Lacquer
J