My Ballerina II boat has a marine plywood deck, currently covered with
canvas and Butinox, a proprietory paint coating with a rough surface.

It isn't watertight and water is penetrating beneath the paint/canvas
layer. I'm considering stripping down to the wood and sealing with
Smith Coat Clear Penetrating Epoxy Sealer (CPES)or something similar.

Can anyone provide any guidance?

Ken Fraser
Tobermory, Mull (Scotland)