Time to refresh this post

Lots of sanding and fairing going on. End may be in sight soon and I am dreaming of primer and 'sky blue' paint. Anyone ever use "bilgecoat"? I am looking to try something new below deck and on hatch bottoms.
Pixs:
hatch cores:
Transom almost fair: if anyone has a clue on the brown base let me know. The boat had green bottom paint that seemed to wear totally off. Then it left the white haze (on left). Hit that with a sander and you get brown . Original barrier coat? I have no clue. Plan is to keep hitting it with 80 grit and use 'Hydrocoat' over it. ??
deck getting there:
and the classic air filled with dust photo