Stitch and glue boatbuilding method using epoxy is a fast and easy way for a beginners to make a plywood boat. The plywood is thin, so i had to use quite a number of supports to hold the thin strips after it was cut. apparently the accuracy of the cuts are not that important. Fig 1 – because of plywood’s cross grain, a plywood frame will be flimsy and not as strong as one from lumber of the same thickness. fig 2 – however, because of.