I have found that a sharp scraper is much faster than sanding to clean up the scarf joints, and easier to keep from dishing out the plywood. You might want to give it a try. Works good on epoxy drips, too.
When I built my punt, I spent good money and a day's driving to get to Chesapeake Light Craft to buy several sheets of fingerjointed okume plywood. While I still needed to sand the joints, I did not need to scarf the ply by hand. I hate scarfing plywood.
I have found that a sharp scraper is much faster than sanding to clean up the scarf joints, and easier to keep from dishing out the plywood. You might want to give it a try. Works good on epoxy drips, too.
Sharp scrapers are the secret wonder tool for working with epoxy – that and judicious use of a heat gun when you make mistakes.
When I built my punt, I spent good money and a day's driving to get to Chesapeake Light Craft to buy several sheets of fingerjointed okume plywood. While I still needed to sand the joints, I did not need to scarf the ply by hand. I hate scarfing plywood.