Brass cleaning is the process of removing dirt, grease, tarnish and corrosion from brass objects, ranging from gentle washing to polishing to a bright finish. The right approach depends on the object, its age, its surface finish and the owner's preference for patina or shine.
Brass tarnishes as it reacts with air and moisture, forming a brown or dull surface, and green verdigris may appear where moisture has been trapped. For most antiques, a careful wash with mild soapy water and thorough drying is the safest first step. Commercial polishes can restore brightness but are abrasive, and repeated polishing wears away fine detail, engraving and old patination over time. Lacquered brass, common on Victorian and later lighting and fittings, should not be polished, as this damages the lacquer and leads to patchy tarnishing. Gilt bronze, often confused with brass, must never be polished, and should be left to a specialist. Collectors increasingly value an untouched aged surface on early pieces, so restraint is wise. Residues of polish should be removed from crevices, and a light coat of wax can slow future tarnishing on items that are handled regularly.
