The stickies are your friend, and they will never leave you (they have no legs). The answer to your question:
NEVER FIBERGLASS THE OUTSIDE, as it will ruin the detail of your piece. Always fiberglass the inside.
To the mods and everyone else:
I think it would be a great benefit to the community - in particular the noobs - to incorporate a Tutorial section into the forums. I've heard this brought up at least once, and think it would be a fantastic idea. It would help to remove the growing, and perhaps overwhelming, number of stickies in each section as well as provide noobs with a much easier way of locating the answers to their questions. For those of us who have been around for a while, the threads and stickies are fairly easy to navigate. But I can see how for some new members, this could be just overwhelming enough to cause them to think that making a thread asking the question would be easier than trying to navigate what looks like a labyrinth of topics and stickies to them.