Flo coating tips thinking about flo coating my boat. So does all the fiberglass need to be sanded smooth and work my way up in grits before flo coating. Also i have some raw glass on stringers and the center portion of hull that wraps up the tunnels should that get resin first then sand. Minimal fiberglass ezperience thanks in advance for knowledge shared. Grit sizes would be a help 40 then 80 120 220 400  is this a good combo how far do i need to go ip etc.