It seems I always have a few oz of mixed epoxy left in a cup when I'm applying epoxy to a hull.
Over the years I've coated things like canoe stands, ax and hammer heads, and even planned ahead enough to epoxy a canoe paddle.
My latest was making threaded knobs for jigs. I've even epoxied 1/4" nuts in leftover resin.
here's a few pics.
Jim
Left over mixed epoxy
Left over mixed epoxy
Keep your paddle wet and your seat dry!