My Best Homemade Place your cursor on each image to see notes. This material is hard to get, it comes in 1' X 4' pieces.
Boomerangs are three dimensional.
Lay out the shape on the plywood, cut out a rough shape with a saw, cut final shape by hand using fine rasp and sandpaper. Rough out airfoil using an electric sander or a big toothed rasp. Cut final airfoil with a fine toothed rasp. Use the glue lines in the plywood to help you get the surface right. Finish with sandpaper and polyurethane.