Cleaning Gilded Bronzes.
II.—After removing the grease spots, let dry and pass over all the damaged parts a pencil dipped in the following mixture: Alum, 2 parts; nitric acid, 65; water, 250 parts. When the gilding becomes bright, wipe, and dry in the sun or near a fire.
III.—Wash in hot water containing a little soda, dry, and pass over the gilding a pencil soaked in a liquid made of 30 parts nitric acid, 4 parts of aluminum phosphate, and 125 parts of pure water. Dry in sawdust.
IV.—Immerse the objects in boiling soap water, and facilitate the action of the soap by rubbing with a soft brush; put the objects in hot water, brush them carefully, and let them dry in the air; when they are quite dry rub the shining parts only with an old linen cloth or a soft leather, without touching the others.