Learning metalworking, metalcraft.
Metal trade education. Hobbysmith.
WORK IN COPPER: How to Make a Copper Bowl. page 22, Now take your round top stake and put it into the bench vise. Place the bowl overn the round top stake and with the planishing hammer beta the surface until perfectly smooth, driving the metal just hard enough to flatten the bumps. Wooden block, surface will be true and bright and covered with brilliant facets. skillful hammer-man, bowl, trim with shears
Working in Metals by Charles C. Sleffel