Other chemical or common names include Powdered chalk. ![]() Available from chemical supply house, grocery store or pharmaceutical supply distributor, or hardware store.Potential hazards: TOXIC MAY IRRITATE THE EYES.Other chemical or common names include Ammonium Hydroxide Ammonia water* Aqua ammonia*.Common names are indicated below by an asterisk (*).ĬAUTION: DO NOT MIX AMMONIA WITH CHLORINE BLEACHES, A POISONOUS GAS WILL RESULT! DO NOT USE BLEACH ON BIRD DROPPINGS. The grade of purity of common name substances, however, is usually adequate for stain removal work, and these products should be purchased when available, as they tend to be less expensive. This usually means that the substance is not as pure as the same chemical sold under its chemical name. NOTE: Chemical products are sometimes sold under a common name. These guidelines should be reviewed prior to performing this procedure and should be followed, when applicable, along with recommendations from the Regional Historic Preservation Officer (RHPO). General Protection (Surface and Surrounding).These guidelines cover the following sections: See "General Project Guidelines" for general project guidelines to be reviewed along with this procedure.Removal and reapplication of the lacquer, however, will not harm the brass surface. Lacquer protects the brass finish from deterioration, though some brilliance of its surface characteristics is sacrificed.Lacquered brass will usually last about 10 years and does NOT require frequent polishing.All polishing, however, removes some brass. Unfinished brass MUST be polished frequently in order to maintain its luster.Architectural brass hardware and trim is generally maintained in a highly polished, "bright" finish. ![]() Solid brass is more durable than brass-plate and, therefore, can withstand more rigorous methods of cleaning. Brass-plate is a thin layer of brass bonded to steel.
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