Remove bowl from water bath. With mixer on high speed, beat egg-white mixture until stiff peaks form, about 8 minutes. Spoon meringue into a large bag fitted with a star tip. Pipe 1-1/2-inch-size kisses onto baking sheets lined with wax paper. Bake 1 hour. Turn off oven, but leave in meringues until completely cool, about 1 hour.
Place melting wafers in 3 separate bowls, with 1/2 teaspoon vegetable shortening in each. Microwave 30 seconds, stir, and microwave 30 seconds more, until melted. Line counter with wax paper. Dip cooled kisses into melted wafers, place on wax paper, and cool completely.