Architectural Bronze is an easily machinable grade commonly available in round, square, and rectangular bars & tubes, angles, channels, as well as custom extruded shapes. Architectural Bronze has a nominal composition of 57% copper and 40% zinc, with the remainder being lead.
Dirt, grime, fingerprints, and slight traces of oxidation can be removed using a solution made up of 50% lacquer thinners and 50% water. Be sure to clean the panels only with the direction of the grain, never against the grain. You will need to use a lint-free cloth for bronze sheet metal cleaning, then rinse the panel using clean water, and wipe with a dry lint-free cloth to dry.