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How much Epifanes for a 15 footer ?
I'm going to be using Epifanes Clear on my Hiawatha and will probably go for 5 or 6 coats on the outside and maybe 3 or 4 on the inside.
Any idea how much I'll need ?
Some data here http://www.epifanes.com/home.htm click "Paint Sytems" and whichever "info" link applies to you. The Epifanes data is metric so coverage is presumably given in square meters; I'd guess a 15 ft canoe would have 8-10 sq m total area for in/outside. Epifanes recommends 7 coats I understand but a boat taken out of the water between trips might be OK with less.
You should be able to get 1 to 1.5 full coats inside and out on an average canoe from a 1L can of Epifanes, use a splash of Epifanes thinner to help it spread, more when it’s hot. No need to over thin first coat as you have already sealed the cedar with epoxy