Okay, I hear you on the roof. But.... you can cover that up with solar
I bet if the sides would buff up nice and shiny, you'd be pretty happy with it (at least, I would).
But you're right to take care of the leaks
Mold release wax is, well, wax that they put into the female mold before they start to make each trailer (or boat, or whatever molded). Then they spray in the gelcoat, and then start laying (or spraying) in fiberglass.
Amazingly (I find this hard to fathom even though I know it's true!), the wax can/is still there 30+ years later. Or traces of it anyway. So it's always a good idea to remove it before doing anything that you want to adhere to the shell. Probably less important for caulk than for other things, but I would want to remove it before putting on that putty, for example. It's like a waxy/greasy contaminant that can cause poor adhesion.
But, easy to remove
If you want to get fancy, there are specific solvents, like Prep Sol or Interlux 202 (what I use and which Fisheries will have). But you can probably do just fine with acetone, too.
The key is to not recontaminate as you decontaminate. So you want to fold the towels/rags carefully, and only use each fold once, so you don't re-swipe an area with an already swiped bit.
Then it will be gone.
But anytime you re-bed, reseal, or etc. it's a good idea to at least wipe with acetone or denatured alcohol, after you clean the dirt off.
Yeah, I know. Now
we tell you
PS: On the other hand, look how far you've come in just a week or so, considering this thread was about how to find someone else
to work on your egg for things you couldn't do (then, but can now
PPS: If you are interested, there are books on fiberglass boat maintenance and repair that explain (and show) how to do a lot of this stuff. Not that that replaces the forum, but I like to have reference material to hand too.