Caring for your antique metal items requires know-how. Each metal has its own particular characteristics and requires its own brand of tender loving care.
Brass
Brass is commonly found on decorative items, hardware and fixtures. Avoid cleaning with acids such as vinegar or lemon. The acid is too harsh. Likewise, avoid ammonia- based products such glass cleaners. A coat of clear lacquer is often applied to brass to prevent tarnish. A coat of paste wax will slow tarnish. But antique brass should not be polished because the patina that develops over time is desirable.
Bronze
Sculptures, lamp bases, fixtures are sometimes made of bronze. There is good news with this metal. The less you do the better. The patina that comes with aging on bronze is desirable. So, don