Jon,
I would test both acrylic to acrylic, and acrylic to glass.
I know when they set the 2.5" acrylic tunnels at my old job, they used a very wicked Sika primer to etch the acrylic first.
Now theres another name that I've used alot of - Sikaflex. Gooey, sticky, great stuff
Being around boats, you probably have used it too.