Thanks for this @jscherb and @jgaz. I will be prepping mine to repaint it, but I have a couple of tweaks that I want to do to the structure beforehand. I've done quite a bit of fiberglass work in the past, and knew that something looked different about the hardtop's build. My plan was to just use standard polyester resin, so I'm glad to see this info.
I have a somewhat related question. With the top being double-wall, I've wondered about drilling an access point and pouring dense, expanding foam into the hole. In my mind, this may serve as some insulating, but most importantly as a sound dampener. Do you or anyone else know of this being done, and have some Pros and Cons info before I commit to it? As you know, once that's done, there's no turning back.
Glad you found it useful.
Also glad to see @jscherb on here.
If anyone can help any of you with your hardtop questions, he can.