: My solution on my second strip build was to seal coat after filling as much
: as I could with slivers of wood, then going back over with an
: epoxy/sawdust/mircobaloon mixture to fill any remaining little gaps.

This sounds like a good approach to me. A couple questions for you though.

Did you fill the gaps with epoxy putty immediately after applying the fill coat or did you let the fill coat cure first? Seems like I read somewhere that if you apply epoxy putty over a partially cured fill coat you end up with a gooey mess - however, I don't see how this would be much different than applying the cloth and first resin layer over a partially cured (12-24 hrs)fill coat.

Did the fill coat and putty areas need sanded before continuing with the fiberglassing? If so, it seems I would have to let it fully cure instead of following up with the cloth and resin step in the normal time sequence.

I've started to fair the hull on my 'Cape Ann' and the gaps aren't nearly as apparent as I thought they would be so it isn't going to be many areas that need filled as I first thought.