Rather than using waxes or polishes that may contain cleaning agents, foundries recommend Johnson’s Paste Wax, or Renaissance wax which is inert and will not yellow over time. A thin, even coat of wax should be applied to the clean bronze sculpture using a soft bristle paint brush (once again, wrapping the metal part of the brush with tape will protect the surface of the bronze sculpture from damage. The wax should be allowed to set up for several hours, then the bronze sculpture can be buffed or polished using a soft cloth.
A second coat of wax will add additional gloss if desired. There is no harm in waxing a sculpture more frequently if the wax is applied in thin coats.
For maintenance and care of bronze sculpture such as your outdoor bronze horse statues, cleaning and waxing once a year as a minimum is something I highly recommend. If the bronze is being exposed to high humidity or other adverse
conditions, waxing the bronze more often may be needed in order to protect and preserve your patina.
For questions regarding care and preservation of the patina of your bronze sculpture, it is wise to consult with a professional patina artist or bronze foundry in order to best protect your investment.