The cast iron is naturally rusted, brushed and treated with dark beeswax. Since rusting is a natural process, the rust effect can be different. By using dark beeswax, it is possible to obtain a beautiful, even effect. Where there are large differences in colour, it is necessary to repeat this procedure several times and let the beeswax dry properly. As with wood, the fitting must be maintained regularly in outdoor use. A layer of beeswax forms a film and will counteract further oxidation.