Re: Canvas Covered Plywood Hull
Cuyahoga is right. Canvas on canoes is just stretched - doesn't have to be stretched all that much either. Some folks do it by hand. It is not glued on, just tacked at the gunwales and the stems. That makes it relatively easy to replace. Undo the fasteners and it falls right off. The weave of the canvas is filled with canoe canvas filler, which is a mixture of paint, linseed oil, turpentine and plenty of silica and mildecide. Lead can be used as a fungicide. There are many "secret" formulas for fillers. You can also buy mildecide treated canvas. The filler is rubbed into the weave and allowed to cure for about six weeks. To give you some idea of the durability, I went at a cured canoe today with a ROS and 60 grit and hardly even scratched it.
Penn Yan and maybe a few other companies used aircraft dope to fill the canvas and that may explain the buzz.
"Wherever there is a channel for water, there is a road for the canoe. " - Thoreau