Darkroom Sink OK to Fiberglass over Primer, +Paint or Bare Wood?

Sink's built. I'm about to line it with fiberglass cloth and two-part epoxy
resin. I built the box with 3/4" G1S Fir plywood. (an 8' X 28" sink in case
you're wondering, as per "Building Your Darkroom" Lista Duren & Will
McDonald, 1990). Duren's book doesn't have any info on using fiberglass
however. If I go fiberglass resin w/cloth on bare wood there should be no
problem right? Or should I prime the whole thing with oil base primer
with/or without oil-based paint? If I do paint it will I be able to see the
color through the fiberglass? Can Fiberglass resin be top-coated with paint?
Thx. And thanks to all those who gave me practical advice on the colour of
the darkroom question too. Many good points. Incidentally Orange is the best
colour to wear with Dektol. Orange is the new Black this year.