Enameling is painstaking work. Imagine reproducing Van Gogh’s “Sunflowers” in minute detail, petal by petal, on something the size of a postage stamp. Then imagine painting it in enamel, a durable, long-lasting mix of powdered glass and oil, when nearly every stroke of color, applied with brushes as slender as needles, must be fired in a kiln and cooled before proceeding.