I'm a Smooth On guy. I make all sorts of bows, and Smooth On is just more versatile. I used Urac 185 on backed bows for a while, but when it was no longer available, I never bothered with Unibond.
I still prefer Resorcinol for Z-splices, and I have some new unopened. I plan to get a bunch of billets ready and do them all when I open the cans... if it's still any good. If it's no good, I'll use Smooth On for the splices, which I have done numerous time without a problem.