Sanding the inside is about the worst job in building this type of boat.
At least I have been away paddling both weekends in the last two weeks which was good fun.
Sanding is an arduous task that I do from time to time. The boat is now ready for epoxy coat on the inside.
A few gaps have been filled with epoxy so that hopefully I will not get any air bubbles when applying the glass cloth and epoxy.