Adams, John D. (John Duncan), 1879- · Chicago : Popular Mechanics Co · leaf 56
METAL WORK AND ETCHING 50 same reason the painting out of the edges and the raised portions will also have to proceed rather slowly and with some little care. When the etching is sufficiently deep, remove the asphaltum paint with kerosene and then wash with soap and water. The slot for the strap or… … the central portion should be raised by placing the fob face down on wood and beating it with the ball end of the hammer.
Metal-work · Etching
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.