Yes, the yellow does take an extra coat or two, at least it did on my SUP, especially because I used some fairing microballoons to fix some epoxy screwups and it is a dark purple color against the pale okume ply.  

Brightsides seems to take a long time, like weeks, to reach its final hardness.  Once there, it is pretty good, but face it, drag it over sharp rocks or a concrete ramp, and you will have to do some scratch repair.  Even a clear coat wouldn't prevent that.  I did find out on my skerry that the Prekote primer really isn't the ticket.  It's soft and if there are any areas with more than a tiny film of it, they make the finish on top softer.  If I had it to do again, I'd have sanded more and put Brightsides right on the epoxy.  That's basically what I did w/ the SUP, using the epoxy/fairing mix to deal w/ some of the surface faults instead of the primer.  Better hardness.

   Thanks

I have a few months before launch so the paint should be solid.