To bronze tin, prepare two solutions.
(2) 4 parts Verdigris, 16 parts Vinegar.
The article to be bronzed is to be thoroughly cleansed by means of a brush dipped in a fine earth and water, and after it is dry a light coat of the first solution is to be applied to both sides by means of a brush. When it is dry the article looks black; then the second solution is to be applied with a brush until the article assumes a dark copper-red color. Then allow it to dry for one hour, and polish with a soft brush and finely powdered elutriated blood-stone, the surface being often breathed upon in order to secure adhesion of the blood-stone. Then polish it with the brush which is from time to time drawn over the palm of the hand. The bronzing is protected against dampness by covering with a very thin layer of gold lacquer.
(2) Tin and tin alloys, after careful cleansing from oxide and grease, are handsomely and permanently bronzed if brushed over with a solution of 1 part of sulphate of copper (blue-stone), and 1 part of sulphate of iron (copperas) in 20 parts of water. When this has dried, the surface should be brushed with a solution of one part of acetate of copper (verdigris) in acetic acid.
After several applications and dryings of the last named, the surface is polished with a soft brush and blood-stone powder. The raised portions are then rubbed off with soft leather moistened with wax and turpentine, followed by a rubbing with dry leather.