We constantly get asked about the use of Bowling Alley Wax on Metals such as Steel, Bronze, Copper and more. This is a very popular use for our products and several articles have been written about it.
Rather than regurgitating the same info, I thought it would be better to point you to the sources.
Popular Science printed a great article on how to protect Metal. It can be found at: http://www.popsci.com/diy/article/2009-11/secret-beautiful-steel-comes-bowling-alley
The New England Sculptors Association Recommend Bowling Alley Wax for annual application on outdoor sculptures: http://www.nesculptors.com/sculpture_care.htm
The Texas Historical Commission also wrote a great paper on using Bowling Alley Wax for Statue preservation: http://www.thc.state.tx.us/annualconference/cofpdfs/crng_mnmnts_mrkrs_sld_10.pdf
Pennsylvania Historical & Museum Commission article on protecting Ancient Iron, Bronze and Zinc Grave Markers: http://www.depweb.state.pa.us/portal/server.pt/community/grave_markers/1926/metal_types_and_repairs/280328
National Park Service give us maybe too much detail on how to care for Bronze Plaques using Bowling Alley Wax: http://www.nps.gov/museum/publications/conserveogram/10-05.pdf
OK, One more Outdoor Sculpture Care from Williamstown Art Conservation Center: http://www.williamstownart.org/resources/images/WAAC%20Outdoor%20sculpture.pdf
Hopefully I didn’t overwhelm you with information. I always figure too much is better than too little…