To those who have personally barrier coated their 23, How much epoxy did the job require? Trying to get all my supplies ready, Thanks!
My 19 required two gallons for the 5 coats I applied.
Just did an Islander 36 with about 5 gallons of Interlux 2000E.
Depending on where your project is, I have a spare gallon as I bought the 3 gallon can.
If I were you, since Tim used two, I'd buy the 3 gallon can and keep going til it's gone. Extra doesn't hurt, and 3 gallon cans make neat little stools especially for trailer bearing work.