Per the instruction manual, I plan to use Interlux Perfection for the hull bottom, since the boat will be trailered.
In the preparation instructions for this paint there is a section called "Bare Fiberglass" which is what I had planned to follow. My thinking was it should be the same as fiberglass-encapsulated plywood as far as preparation is concerned. However, part of the prep includes one coat of Interprotect 2000E, which is a two-part epoxy product designed to prevent water permeation. This leads me to believe that the "Bare Fiberglass" section is for polyester resin fiberglass, not epoxy resin.
Since I am using epoxy resin (obviously), it seems to me that I should be following the "Clear Epoxy" section instead. That is, my understanding is that epoxy resin itself prevents water permeation. The Interlux "Clear Epoxy" prep section is basically the same as the "Bare Fiberglass" section except that it does not include the use of Interprotect 2000E. FYI, here is a link to the Interlux Perfection instructions: http://www.yachtpaint.com/MPYACMDatasheets/Perfection__+eng-usa+A4+Y+20100608.pdf
I know this seems like a "no brainer," but I want to be absolutely sure. I have no desire to be lifting the boat off the trailer someday and having to re-do a botched paint job.