M_Boats: looking for input on gelcoat application on M-17

To add gelcoat or not?  Here's the deal; we stripped all the paint below the water line since we didn't know what it was, and it needed refreshing.  I also removed a through hull, and redid a couple old through hull patches I found because I didn't like the looks of them.  As we removed paint we found many areas (particularly under the lapstrake edges) where the gelcoat had been previously been sanded through.  And of course I have the new repairs I did.  Should all this have gelcoat reapplied over the fiberglass?  I will be using Interlux 2000e primer, and maybe Bottomkote NT over it (not sure on that yet).  The boat will be moored in fresh water for 5-6 months.  Any thoughts on what should be done for proper protection/longevity of hull?